And you should get some experience developing something more complicated than a simple unity project.

Not a game, but I was involved in making a graphics heavy app. Significant amount of times we had to grapple with question " that’s a nice feature you are making, will this work on all the platforms", and significant amount of times the answer was “obviously, unquestionably no”.

comes down to the setup of the toolchain.

Unless you’re developing graphics-heavy application that uses platrofm-specific API for optimisation. Like a video game for example.