The more in the park, the longer it takes for stats on rides.

[ExCrafty]

Just asking, is this something that the new save format may address, or is it a fact of life because of the age of the games engine itself ?

Sometimes it can take a few minutes for the stats to show, as if the game is doing so many things at once that it struggles.

[Gymnasiast]

This is unrelated to the save format.

It's not really a "fact of life" either - it could be made to run more often, but obviously there is a balance to be had between having stats quicker and having good frame rates.

[ExCrafty]

What sort of numbers would you think should be happening then please ?

Currently on in-progress and full parks (due to the current limit) I'm averaging 60fps uncapped.

[Gymnasiast]

Not sure. That would need quite a bit of testing on different configurations - what might work on your system could noticeably slow down someone else's.