All true, but I would add that the vibration from individual wheels that are out of balance (even fractionally) can often be felt much more acutely after lift-off, cos as they track along the runway, that keeps the vibration in some kind of check, but once they start spinning freely the vibration can be a lot more noticeable. Part of the retraction sequence is to brake the wheels to a halt, and often you can feel the frequency of the vibration change (reduce) as the brakes take hold. It's not dangerous, but it can give you a bit of a fright.
The first time I noticed that vibration after lift-off was as a teenager, I'd just read a book about a Lufthansa 747 that crashed in 1975 after takeoff at Nairobi cos the slats weren't set (shades of the NW MD80 accident at Detroit). The plane stalled and all the passenger accounts in this book described the vibration and pre-stall buffet. I thought the same thing was happening. Nothing is worse than knowing a little bit, cos you think you know A LOT and scare yourself (and your bad-flyer Mum travelling with you). Such naivete!
fly Saha Air 707s daily from Tehran's downtown Mehrabad to Mashhad, Kish Island and Ahwaz