I personally just have one Project dedicated to testing
Basicallly, If i need to do something totally irrelevant to any of the stuff in there, i'll just make a new scene and switch the main when needed for the next test
So if you wanted
Rather than making 500000 Projects, You could make a new scene for every test thingy you wanna do, it's what i do, it's alot more easy to manage for me than 5000 projects
(sorry if im repetative i literaly just woke up as of writing this)