out of topic: just because I have some spare time, which is the counterpart in suunto for the F5X+?
After two or so years of ownership, I'm pretty happy with my 5X and if it does get new features, added with a firmware upgrade, that's a bonus rather than an expectation, imho.
The battery is still running strong and the GPS, whilst not perfect and needed to be tied to a speed sensor to get better results, does the job I want it to. It still looks great with little sign of wear too. Pleased to see constant fixes and refinements too, in regular firmware updates.
Not seen anything since the 5x that has drawn my eye but I'll look at the 6 when it comes out. If there are improvements where I want them to be, then I'll consider that model. Those would be hardware features for me though. Improved battery, processor, gps, screen, etc.
I don't expect to be given new features for free and would also consider paying additional if it was an option and something I wanted. I don't begrudge companies not backporting features and function, though I salute them when they do. I bought into this at a point of time, with a known feature list and anything beyond stability is just a nicety not a given.
However, some newer features don't have dependence on hardware and these should be backported for older watches that can support it.