I do my own maintenance, partly for the satisfaction of being able to maintain my bikes and also build up a bike from a frameset, and build wheels. The latter obviously takes me longer than a professional would, but they seem to have lasted well enough. Although lately when I needed new 20" and 26" wheels I just bought them ready made as there isn't much price difference compared to buying hub, rim, spokes separately.
However I have various non-standard bikes (vintage Moultons, recumbents) and still use 9 speed gears with friction shifting so that I can mix and match whatever parts are in the bike shed (aka the largest bedroom) and minimise buying new stuff. And vintage Sturmey 3 and 4 speed hubs, which I haven't attempted to dismantle and service. Local bike shop might not be interested in this sort of niche activity anyway.