One more thing I'll chime in on!
I've seen numerous complaints about Adobe Support. Well, I can't comment on that except to note that in my two times of needing Adobe Support, and popping up during their "active" time, I've gotten help! Once over the phone, and once in the online "chat", once was for Photoshop installation in the old MS Vista OS, another just getting some assistance, but anyway, Support was "there". then, even though Adobe is a large company and with Photoshop as well as their other products there must be a whole lot of complex issues to sort through!
But one thing I want to bring up, and that is the performance of the Lightroom (and ACR) "team" in addressing and resolving issues.
Going back to the early days, some of us in the LR Users Forum used to chat about how nice it would be to have "this feature" or "that feature"! However, it was all "pie in the sky" chatting, knowing the complexities of the Camera Raw engine having to first render the Raw data competently and then applying the existing adjustments in a "non-destructive" way. We were so impressed by all that LR was doing in its early releases, we couldn't imagine some of the "stuff" we were dreaming about!
But I will say: the Lightroom team has paid attention! It's true that minor version upgrades only come out every three months, and then the Major Version upgrades every year or so -- Oh Well. But the point is that those upgrades show real work, both in the 3-month minor versions, and then especially when a new major version gets released!
I don't know how these things work, whether a lot comes from the Users Forum, a lot from their "Bug Fix Request" forum, a lot from their online service requests -- I don't know, but the point is that I've been very HAPPY with what the team has accomplished over the years! In fact, some of the things that we would chat about in the old days, the "in your dreams" stuff, came out during the Version 2 release, and even more in the Version 3 release, I have thousands of photos from those releases (using the Process Versions 2003 and then 2010), and now I've been quite happy using the Version 4 release, with the Process Version 2012 and all, and still I see the features in Version 5, 6, and then the CC releases, and yeah, things are good!
So, like I said, the LR Team has been a group of dedicated, busy people! They have to work with both LR and also Camera Raw with Bridge, trying to put out the best!
So, gosh -- the common complaint about LR being "sluggish" when taking in the huge files created by modern DSLRs and doing all that "under the hood" work on them, well, sure, although I'd keep my eye on things -- new Version releases have a habit of providing some real improvements!