I like them in BF1. There is a split second where you are vulnerable - you need to be careful and sometimes not get in or out if infantry are watching.
They seem too long in BF5. Especially for passengers and especially for planes. Several times I have bailed out only to end up about a mile away out-of-bounds to die. Ok, so press the button earlier? Then the pilot turns and you end up a mile away out-of-bounds in a different direction...
Earlier I 'got off' that slow half track bike. You'd think it would be quite quick, but I ended up in the canal because it kept slowly rolling while I took ages dismounting hehe.