I bought a DSLR and then I bought a rangefinder, then I bought a Leica IIIf, then I bought a Voigtlander ... then 🙂
I find the DSLR great for its autofocus (but sometimes frustrating for that aswell - if you know what I mean). The DSLR is great for telephotos, great for grab shots of my teaching / students and great for quickly sharing / repurposing of good quality photos into movies and so on. But the Leica and my other rangefinders get at least 50 - 60 % of my use most of the time (and a 100% sometimes).
Having said all of this I did find myself thinking 'why did I buy that DSLR?' when I was in the first throes of rangefinderdom, but I've moved on in my thinking and I'm glad that I kept my Pentax *ist DL. DSLR's are worth nothing 2nd hand anyway and ... well I think you might regret selling it off at some future point - tool for the job and all that.