Meh!

I hate cleaning and relubing the chain and dirty sprockets (freewheel and chainwheels). It is messy, smelly, takes as long as all other maintenance combined and lasts only about 5 minutes before everything is dirty again.

Stuck seat posts and stems are in a different category, for me. I don't let them happen in the first place and seem more in a category of damage/abuse, akin to crashing,... not normally encountered.