I don't mean to hijack your thread. I was going to share the images below here in this forum, but I think the comments I was going to share speak directly to your question. So I'll just combine my post, along with my 2 cents regarding the M5, etc. I hope you don't mind; and I hope it's helpful too, as I've recently upgraded from an M5 to M6ii. First, I'd imagine you've read up regarding the future of "M". If not, search in dpreview while you still can; there are more discussions about that than I'm sure you care to read. Why did I stick with the M series and even upgrade? For my purposes, it's the perfect system. The body is compact, there is a great selection of lenses, and it's even relatively affordable. Oh, and the M6ii performs like no other camera I've ever owned (more below). Of course, that's all my opinion; others certainly feel differently or have different needs. I know there are shortcomings, but for me, it's everything I want.
A few M6ii shortcomings: the system is, or certainly appears to be, discontinued. That's no small thing, but I'm invested and, like I said, I love it. So I'll enjoy it for as long as I can, hopefully forever. The M6ii by default has no view finder. I was worried about that, but honestly, as my other camera is an iPhone, I don't think I even notice anymore. There's no native 'fast' zoom. I'd love one, but I own the Canon 11-22, Sigma 30 f/1.4, and Sigma 56 f/1.4. I LOVE all three lenses, and I don't mind switching lenses as needed. Honestly, if there was an f/2.8 zoom, say 17-55, I don't even know if I'd want it. I love the wider apertures and the image quality I get from the three aforementioned lenses and, like I said, I don't really mind switching lenses.
What do/would you gain by upgrading your M5? The post I was going to start -- and why I'll just do it in answer to your question -- speaks directly to that. Below is essentially the text I was going to post. In a nutshell, the M6ii just performs! It focuses FAST; it can shoot FAST. You can compare specs and see, I'm sure, that there are other upgrades as well. You just have to evaluate them with respect to your needs and uses. Maybe for landscapes and portraits, that's not the be all end all. But it's definitely more than nice to have IMHO.
Last week was my first "real" test of my relatively new M6ii ... and wow! Since upgrading from my M5, I've mostly taken landscapes and snapshots of family. I could tell that the M6ii was really responsive, and I've enjoyed all the enhancements and advancements above and beyond what the M5 could do. But I hadn't really been in a situation where I'd captured anything I couldn't have likely captured just as well with my M5, and maybe slightly more patience. But on a trip to Lexington, KY last week, I had the chance to take some shots at a racetrack while the horses were being worked out in the morning. The focus locked on -- quickly! -- and the camera performance, in terms of high speed frames/second, was awesome. I'll share some samples below, and I'd be happy to hear what you think, good or bad -- well, constructive -- about them :-)
(Of course, I had to resize them due to the 4MB limit. So I hope I did it in such a way as to not lose too much quality.)
Thanks for looking!