Wow! When I was a bike racer, I was poor, bibs barely existed and nobody wore them and our guru (John Allis) wore suspenders. I did too. Still do. Now I could afford $150 bibs, but $90 shorts and $15 dollar clip on suspenders work really well and every time I have the need to do business I appreciate those suspenders one more time. (And I have bought one pair of quality bibs. When they were new, they had all the advantages of good shorts and suspenders, my jerseys looked a little better and #2 meant undressing, sometimes in so not so clean and nice places. Don't miss that at all.)
Oh, once those bibs got a little old, the straps stretched and the chamois fit (and goods retention) was no longer up to par. I know someone here sews a fold in his straps but shortening suspenders is a lot easier.
Not trying to stop anyone from wearing bibs, but I will probably always shake my head at the thought that anyone who is not paid to wear them would by choice.