It seems like, after going through this thread... that there are 3 kinds of '41' people.
1) People like me, that just treat it like any other firearm they have/had/might have... realizing that it very closely mirrors the .44 and nearly the .357 (when downloaded, etc) and that every platform had it's own advantages and disadvantages.
2) Others that have found it really isn't for them, or prefer a different cartridge and/or firearm, or just don't like it as much as their trusty .357/10mm/.40/.44/.45, etc.
3) Others that, if not hate, well... lets just say realllly dislike the .41 for myriad reasons.
I've been loading for the .41 for almost 30 years, I never really had a problem finding something to load for it. I don't need esoteric bullet weights or construction. I don't need them at 3000fps. I don't need specialty trimmed-down brass to run light loads. I don't have a problem finding firearms to shoot .41 in... while not as plentiful as some other chamberings, they are out there and are still in current production.
The .41 is not the .44, nor the .357, but you can load all 3 of those (and, for that matter, the peripheral cartridges) very nearly to the same level, the only exception would be to the limits of the cartridge itself. I don't think there is any difference between the recoil of a .41 and a .44 loaded to the same velocity and the same weight bullet... none that I can detect, and I don't subscribe to the notion that a full-house .41 kicks less than a full-house .44... there just isn't that much difference, physics being what they are.
The cost of loaded factory ammunition is roughly the same, comparing apples to apples. Availability might be a factor, but I'll argue that ammunition and components are just a click away. No, you are right... you probably won't find factory .41 at the 7-Eleven in downtown Dallas... you got me there.
There is the argument of versatility... being able to load Specials in the .357 and .44, vs the single 'Magnum' loading in the .41. If you are looking for a lightly-loaded pistol cartridge, I would probably just eschew the .357 and .44 in it's Magnum loadings altogether and find a nice .38 or .44SPC and call it a day. Beyond that, I have no problems loading my .41MAG brass to '.41SPC' levels (however arbitrary they might be.)
You love your .357's...? Great! It's a fine round. 10mm...? I think the 10 has serious potential as an autoloading cartridge. 44MAG...? Another fine cartridge, steeped in legend and lore. The .41MAG...? It may not have the fame or notoriety the others have, but it's out there, everyday, getting it done.