Maintianing the teak is too much work?
Man, if all the jobs were that simple!
I wash my boat down as soon as I haul the boat out of the everytime I use it. I "maintain" my teak by pouring a little oil on the platform and smearing it around after I have washed the boat. I used to use a rag, but then I had to deal with an oily rag so now I just pour it on, smear it around with my hand. I probably spend 30 seconds a weekend on this task.
I have had a variety of boats with various different swim platforms:
varnished mahogany: What a PAIN that was!
carpet over fiberglass: started ugly, got uglier over time, was a pain when the carpet needed to be replaced.
"non skid" fiberglass surface: looked nice, until it got dinged. After a few years it was showing a lot of war wounds.
Teak: It looks great if you take care of it. It looks OK if you don't take good care of it. You can ignore it for years, then spend 10 minutes making it look great again. A few minutes with a sander can erase some pretty major dings that could have destroyed fiberglass.