I have been using the falstad sim for years in the developement of analog synthesizer stuff. There are some circuits that work in practise that do not work in p

I have been using the falstad sim for years in the developement of analog synthesizer stuff. There are some circuits that work in practise that do not work in practise (e.g. relaxation oscillators with a schmitt-trigger inverter). The model oscillates, but it is not really controlable. Outside of that most simpler stuff (e.g. analog math using opamps, discrete stuff) works perfectly fine. I love it for education and quick "sanity check" simulations.