I am looking at new bikes, and one I really like has quick release front and rear wheels as well as seatpost. I love the idea, but I was wondering if there was a major downside, durability wise, or even functionally.

I'm looking at Hybrids and Comfort bikes, It is amazing how nice the bikes around $500 are.

Many come with seatpost suspension too , how well does that work long term?

I do have a bike repair kit, and I promise to learn to use it for simple adjustments and roadside repairs.