What am I selling exactly ? The idea that it's ridiculous to expect people to optimise professional tools for your 5+ years old hardware ?

Vscode existed long before m1 macs. I think designing software that only has acceptable performance on hardware that doesn't even exist yet is where the contention lies. That's hyperbole but I think what is being discussed is more the tendency of developers to be lazy when it comes to performance because the latest and greatest hardware makes their software snappy.

Sure. If it works on 5 year old hardware, it almost certainly works even better on new hardware. I don't find this an unreasonable expectation.

Works on != runs fast, I think vscode runs on raspberry pi or something along those lines.