I went to Ableton about a month ago after frustration heaped upon frustration trying to get the MC8 to work with Reaper and to get Reaper to respond to simple midi commands. I read all the online reviews and watched enough videos to teach a course on Reaper at a community college (smile).
The reviews discussing the sundry pros and cons of each DAW are about as useful as those online chats parsing the tonal, playing, and durability qualities of various guitar strings. What’s the adage? “One person’s junk is another person’s treasure?” It doesn’t make any of us right or wrong, just different.
And you can’t overlook confirmation bias. I WANTED Reaper to be the best DAW because I paid for it and had so much time invested in it. I also WANTED Elixir stings to be the best stings because all my Taylor guitars came with them—so they must be the best, right? 
Anyway, after watching Paul Davids and Mary Spender and other online influencers extol the advantages of Ableton, and talking to acquaintances, my resistance subsided and I took the inexpensive $99 plunge. And wow! To quote Billy Ray Valentine in “Trading Places,” “I can see!”
As far as “learning curve,” honestly, the online videos and Ableton documentation are the best. I gleaned everything I needed in about two days. Yea, there is a learning curve, but it’s much more productive than frustrating—for me, at least. It’s straightforward. You can midi map—this gave me pains, but Morningstar has an online video, use keyboard shortcuts, or create your own keyboard shortcuts (and use your MC8).
And the $99 edition differs from the more expensive editions in that it doesn’t have as many native drums/plugins and there is a 16 scene limit for each live set. All way beyond my needs. Other than that, it’s locked and loaded.
For performances, I would pre-record loops as scenes. I’m really not that controlled to record all but very simple loops under pressure of time and critical-on-stage scrutiny.
For practice, I use the looping functions to watch/listen to/learn/refine the tunes I’m learning. With Ableton live I have to click on the space between the brackets, then I can use my MC 8 to nudge the loop section left or right, shorten or lengthen the looped area and move the entire loop area on loop length left or right. I can pause in the middle of the loop and resume where I left off or press play/stop to start from the beginning.
I’m on my 2nd MC8. I sold the first one before appreciating its power and bought a smaller MC6. But when I wanted to use a Beat Buddy with Boss RC500, I discovered I didn’t have enough ports to sync the clock correctly. So, I sold the MC6 and bought another MC 8. What a fool! LOL! Anyway, I love that thing. Amazing flexibility and Morningstar is the epitome of customer support.
Sorry for the long response, but I tend to get chatty about those things for which I have become passionate! (I also am pretty good at convoluting sentences to avoid ending them with prepositions—-argh!)
I hope it helps!
Cheers!