For me personally I have always had a quite easy time to adapt to a new focal length and I am also happy with large gaps between focal lengths - I have learned to 'see' scenes with what I have in the bag over my shoulder.
I'm a bit to the opposite, although I guess I could get used to fewer focal lengths. Today I have (all SK) 35, 47, 60, 72, 90, 120 and 180. I wouldn't mind having the 150 and 210 either, but my camera bag is full
. The total spending of all those lenses is similar to a single new Rodie 32, as I got most of them second hand and the simpler symmetrical designs are cheaper.
I will have to give up this type of flexibility sooner or later though, the reason I can have this many lenses when I'm out hiking is that SK lenses are very small and light on the Linhof Technika boards. The Digarons, even the Digaron-S range are often twice the weight and size. With my 50MP 49x37mm CCD and this line of fine SK lenses I've reached a dead end, I can only go backwards from here in terms of flexibility which feels a bit sad.
While resolution and noise can be improved it requires switching to heavier larger lenses, so I need to drop some focal lengths, and most likely I need to drop the feasible movement range as well.
I have a Canon system with a TS-E 24 II laying around too, I've been very impressed with the resolution and shift range you can get from a 5Ds and a TS-E 24 II. If Canon ever updates their 45 and 90mm to version II and I find a sane shiftable 35mm that could very well be the upgrade path when my current Linhof/Hassy/SK system starts feeling old, because if lenses in my next tech system is going to be just as heavy and few and give me less movement range I think I will have more fun creating "large format style" images using the Canon --
if those new lenses appear. Today I'm not pleased with the current range of longer tilt-shiftable focal lengths in that system.
My dream scenario is still a new generation CMOS backs that can actually handle the SK symmetric lenses, because I don't feel the lenses are inadequate (they make large prints!), it's the back which is going to start feel old first.
I don't really like the convergence we're seeing, that lenses and flexibility is narrowing down to be the same between systems. If it's only going to be resolution that differs slightly, I don't think MFD will be for me any longer... but it's too early to say. I wait curiously to see what the future holds, and meanwhile I'm happy with my nowadays considered old-school Linhof Techno setup with sliding back and CCD
To be honest I could probably shoot with this setup in 10 - 15 years more before there's trouble with software and digital back repairs. It's the gear junkie in me that starts fantasize about new hardware despite that my current setup serves my shooting style perfectly well and will most likely continue to do so in the foreseeable future.
A CMOS live view certainly wouldn't hurt though...