[Toa Circuit]

After having both, the keyless start is a big pain because:

The 'stand next-to-the-door-to-unlock' doesn't work half the time. Gotta take the fob out. At that point, might as well have a slot to put it into and turn instead of a silly two-push button system that cycles through modes, when I could very clearly tell how far I had turned a key... and then awkwardly put the key fob somewhere not-buried so the car won't bing at me for not detecting a key.

Big picture is important. If it doesn't add any value such as security, ease of use, reliablility, while increasing implementation complexity and cost, why do it?

Only issue with mechanical keys is occasional jams.
Might be me but we'd be better off developing a better lock.

Or better yet, full keypad system? Punch in to lock/unlock, then once you're in it's yours.