Can concur! I had a pair of ITM alu bars snap at the joint about ten years ago on the cycle route through Belgium into northern France - scared the beejeesus out of me, and I wasn't going very fast. We'd just set off from a gate so maybe 12-15mph, went straight over and hitt he deck with quite a fairly impressive thud. It got a round of applause from my family. The cheeky beggars! I've not had a seat post snap yet but I've heard that can be equally dangerous...Always surprises me how rarely we see broken bars without evidence of prior crash - but that sensation of a handlebar breaking when riding is never forgotten
With motor vehicles, driver error is around 95%, mechanical failure 5%
Retrobikers is probably no different.
In Bristol, a deliveroo rider on an illegal Ebike is probably more of a threat than ageing components tbh.