Dev will be fastest on Linux. Then again I don't know. It depends upon what you're doing and the size of what you're doing.
If even a 1 minute or less doesn't work for you, then the best bet is to just use a separate machine if you can manage it.
1 min switching time (as it’s a cost to pay for each start of the dev env) is a lot to pay in productivity . Thought about the two machine setup (for separate purposes) but will be as inconvenient, Ie when I travel I can’t take 2 laptops with me.
Think for my usecase a suite with a good BB is the only good solution - but I’ll wait a bit to see if WSL 2 solves all this