Hardtop use/disuse
For the most part I prefer my Boxsters as convertibles. I do have use for and enjoy having a hardtop available though.
My daughter's 1999 has a plastic rear window and has been used as a daily driver. During the winter you can easily crack the window plastic on a soft top. On her car, I kept the hardtop on from November through March.
I have been to track days where the top was required to be up. For that, I prefer the hardtop.
I have multiple convertibles, so I can keep a top on a car and still choose to go topless. Of my cars, I prefer the hardtop on the red one to convertible. If I want the top off, it's less than five minutes and I do have a method to remove it by myself.