Writing Electron apps for me, as a matter of fact, brings back the time when one had to be hyper-mindful of CPU cycles, just like back in the day when I was writing Windows apps in C++.

Everything is going through the prism of "but how much will it cost in terms of performance? Granted, this should be the case for server software as well, but in case of clients, you don't know what ghetto shit your code will run on - you write for the worst possible case. Server specs are unknown.