Personally, I don’t see the attraction in these type of gadgets, especially when they are north of £100. My Lezyne Super GPS bike computer easily fits in my pocket for non-cycling (and even cycling to work) activities and has a rugged sturdy design, while the ~£25 Coospo H6 chest strap heart rate monitor gives far more reliable readings than these optical wrist heart rate monitors appear to give.
You basically stuck the same suggestion on my thread last week asking about wrist based HR/GPS/Activity tracking for my wife (that led to me ordering the VA3).
Honestly we get it, you like your Lezyne Super, I’m sure it is fantastic. But there are other use cases, for example there’s no way I’d persuade my missus to wear a chest strap and carry a bike computer in her pocket when a watch is a pretty “passive” device and suits her far better.
Other people do multiple sports and thus something on their wrist that covers most bases makes complete sense.
Ever noticed how CX racers mostly wear wrist type GPS/HR devices? In a race where you might swap bikes several times mounting a computer on the bike(s) makes far less sense when your mostly interested in the riders HR…