Since day 1 of MSFS never uninstalled something, only clicked on update when they where presented.
In my mind I hope that they make the update’s so that what must be replaced is replaced and the old is deleted in such a way that our machines are optimized. Until now I see no problem as the used space don’t get much bigger.
And yes, it is better (in my opinium) to do the updates, the guy’s behind MSFS really want this become better and better… (even if you can have an other impression if you read to much this forum 
)