I regularly run 6+ electron apps on a M2 Air and notice no slowdown

2x as many chrome instances, no issues

Sure, 6 electron apps by themselves will eat some gigabytes and you won't notice the difference.

If you didn't have those gigabytes of memory sitting idle, you would notice. Either ugly swapping behaviors or programs just dying.

I use all my memory and can't add more, so electron causes me slowdowns regularly. Not constantly, but regularly, mostly when switching tasks.