I live in MN and ride year round, so it must be nice to only have to deal with some drizzle in the UK instead of salt and 130 degree temperature changes.
I cracked the bearings on a CK BB within 1k miles on one bike. On the replacement I had to have them flushed out every 2k or so miles, so a few times a year, and they never really spun that freely or quietly unless they had fresh grease. Ceramic BBs aren't necessary or noticeable really. Even the drag I had on the CK disappeared if I was spinning the cranks with something stronger than my fingers. It's probably like hubs, the draggiest hub is only 3 watts worse than the best. It'll add up but most of us won't noice.
I currently have almost 6k miles on a 32 dollar Dura Ace BB from Amazon.
I don't think it matters on a BSA BB, but something pressfit it might make more of a difference.