I guess it depends how much you ride in the rain, and whether you ever feel at risk because you don't have the stopping power. On a CX/MTB bike discs are definitely worth it, but on a road bike it's not big difference (the fact that half the pro peloton still ride rim brakes when the option of discs is available shows there's not much in it). But yes, maintenance on rim brakes is way easier than discs, which with current pandemic waiting times in service centres makes a big difference.
Just remember to check your rims for wear after a few (many?) years. I just had a MTB rim snap due to brake wear... Luckily going slowly uphill at the time.
The only time I'm worried about stopping it's due to the roads being wet and the tyres wiping out, rather than actual breaking power.
Jon, not sure what you do to your bikes, I've had some bikes a long time and never had that!
over 20 years and the local "new" long distance paths are coated in granite dust - I guess this gets between the brake blocks and rims and gradually grinds them down... apparently there are tools to measure the thickness (or thinness) of the rims.
A very effective form of granite sand-paper...
20 years !! jeezo
a pair of alloy rims last me about a year, its winter that does most of the damage
you can always run your fingers along the rim and feel how concave its getting :-)