I too had a 1992 Yamaha FJ1200Abs model, recently sold. Bike had as standard the abs on one of the many I had so many years ago saved my life, when I had to brake quickly in a queue of traffic I was overtaking, which did not go as planned.
Never had any issue with Abs pump on that model, and always changed the brake fluid fully on every service interval.
My Kawasaki Gtr1400, however had a major issue, that pump had packed up and required a change, fleabay supplied a working similar one that fitted, job was good, until I traded it later for my now, Bmw r1200Gsa Non-Abs, non-Esa. It just made sense to get this bike, and the good deal offered at the time.
In my opinion Abs is a good system for bikes to have, as long as strict fluid changes are carried out regularly, the system should last the lifetime of the bike.