First some definitions:

Le mot commutateur et son évolution plurielle « multicommutateur » ou parfois « multisélecteur » (en anglais switch / multiswitch) peut avoir différentes significations selon le domaine étudié.

• En électrotechnique, un commutateur ou est un dispositif — mécanique sauf précision contraire — qui permet de choisir quels circuits seront reliés. Un interrupteur est un commutateur qui permet de choisir entre un circuit ou rien1 :
• un commutateur électronique est un composant électronique ou un sous-ensemble commutateur de signal électrique analogique ou numérique.
https://fr.wikipedia.org/wiki/Commutateur

A microarray is a multiplex lab-on-a-chip.[1] Its purpose is to simultaneously detect the expression of thousands of biological interactions. It is a two-dimensional array on a solid substrate
https://en.wikipedia.org/wiki/Microarray

Multiplexed displays are electronic display devices where the entire display is not driven at one time.
Instead, sub-units of the display (typically, rows or columns for a dot matrix display or individual characters for a character oriented display, occasionally individual display elements) are multiplexed, that is, driven one at a time, but the high switching frequency and the persistence of vision combine to make the viewer believe the entire display is continuously active.
https://en.wikipedia.org/wiki/Multiplexed_display#Pixel-orie...

MEMS — Micro-Electro-Mechanical Systems
:
They can sense tiny changes in their environment, be it motion, air pressure, magnetism, or even gases in the air. They relay this information as an electrical signal, making them the sensory organs of the technological world.
https://www.bosch.com/stories/topics/mems-micro-electro-mech...

"Commutator" "MEMS" Approximately 137,000 results (0.29 seconds)
"MEMS switch "Approximately 102,000 results (0.24 seconds)
"MEMS switch array" Approximately 3,440 results (0.28 seconds)
https://en.wikipedia.org/wiki/Multiplexed_display#Pixel-orie...

MEMS applications include the following areas:
— Microoptoelectromechanics (displays, adaptive optics, optical microcommutators, fast-response scanners for cornea inspection, diffraction gratings with an electrically tunable step, controlled two- and three-dimensional arrays of micromirrors, etc.)
— RF devices (RF commutators, tunable filters and antennas, phased antenna arrays, etc.)

Production of the first lot of the arrays of optical commutators (CrossFiber) with a dimension of M × N light fibers (up to 128 pieces in an array) with a cost of 50 dollars per optical input with a possibility of arranging arbitrary switching configurations was recently announced

As compared with semiconductor switches, high-frequency MEMS commutators have extremely low losses with simultaneous high insulation of all components, high linearity, and low power consumption.
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Le commutateur photonique utilisé dans les brasseurs optiques permet la transparence du réseau et une capacité de commutation élevée à un prix compétitif par rapport aux dispositifs électroniques.
:
The photonic switch deployed in optical cross connects promises transparency and ultra high switch capacity at a per port price that might be competitive to electronic switches in the future.
https://pdf.sciencedirectassets.com/272262/1-s2.0-S163107050...

Abstract:
This paper reports on a microelectromechanical (MEMS) switch array with up to 20x20 double switches embedded and packaged on a single chip and utilized for automating main distribution frames in copper-wire telecommunication networks. The device includes 5x5 or 20x20 double-switches, allowing for an any-to-any interconnection of the specific input line to the specific output line.
https://ieeexplore.ieee.org/abstract/document/4433176

This paper investigates the application of microelectromechanical system (MEMS) switches for DC power distribution system.
:
The simulated result of the proposed MEMS switch array configuration is compared with the traditional switches. The comparative study shows that the proposed switch array configuration gives better performance in terms of voltage drop, leakage current, power loss, arc and size
https://www.degruyter.com/document/doi/10.1515/ijeeps-2014-0...

Context 1
... Table 2 shows the summary of technical specifications of a single MEMS series switch. The design of RF MEMS switch array requires large number of switches. The schematic for (2x2) and (4x4) switch arrays designed are as shown in Figure 5 to Figure 7.
https://www.researchgate.net/figure/Top-view-of-2x2-switch-a...