I'm suffering some temptations related to all this, but perhaps fortunately, the camera I currently have my eye on costs enough to hold me back a bit. I own a working but long-in-the tooth DSLR (Canon EOS 40D) and a relatively high-end P&S (Canon G15). For me, the G15 has pretty much supplanted the DSLR for travel. It has an optical viewfinder in addition to the rear LCD screen; plus a 5:1 zoom range with a lens that opens to f/1.8. However, it's a bit slower than the DSLR, although generally quite capable. So I've been eyeing the Canon M5 (or siblings), a mirror-less EVF beastie with interchangeable lenses, etc. I would like get it with one or two new "EF-M" lenses -- perhaps a short focal length compact ("pancake") sort of lens and a fairly wide range zoom for "walking around." If I go that way, a relatively inexpensive adapter would allow me to use my current collection of EF and EF-S lenses for special needs.
Reading endless commentaries at various sites, I get the impression that such cameras may suffer a little in uses like fast action sports or birds in flight, but since I generally do neither, that wouldn't matter. Another factor currently slowing me down is that the aforementioned camera is 24 Mpixel, which probably would push me toward a new desktop computer -- and then I would likely want or be forced, to some software upgrades -- and then maybe a bigger, higher rez monitor ....
So-o-o if I find another trip like 2016's 5800 mile drive through flyover country on my calendar, maybe that will push me over the edge. Meanwhile, since I upgraded to an iPhone 6S, I'm almost embarrassed at the percentage of trip documentation that comes from that.

(Just came back from a trip to include a family event -- used the 40D for the event, but for some side trips and get-togethers, the G15, the iPhone, and yes -- my 1952 vintage Ercona II!)