I think the i7 7700 is totally fine as an all rounder CPU but clearly FS2020 is a CPU hungry sim. The more processing power you can throw at it the better.
That being said there’s plenty of people here who have super powerful overclocked i9 processors who aren’t getting the performance you’d expect them to have with the sim.
It’ll be interesting to see where things go from here as far as optimisation goes. There’s talk of them being able to optimise glass display aircraft a lot better than they are currently. Clearly things will evolve.