I would consider myself a minimalist as I have gone around the house/garage and sold off stuff I don't use/need or think about. It has been less than a year since I started biking (before was a BSO) and it took awhile before I found a preferred commuter (Trek 7.2). I could definitely live with just this bike, but I caught the bug and got a mountain bike. I now want to go longer distances as 40 miles gets tiring on the 7.2, so I am getting a gravel/adventure bike. I have gone over selling the 7.2, but I am going to keep it as a spare and lockup bike to leave in front of stores. So counting my 3, I have 5 in my garage as my girlfriend has one as does my dad who stays with me.
In your situation, I see a good reason to keep a full size bike for longer rides and folder for the ease of transport.
If you want to stick with just 1 bike, I'd suggest staying away from bike websites. You see a lot of photos and articles that make you want to add another bike to the stable.