I have a Garmin with a monochrome LCD face. Ok, it can't compete on price but battery life is a couple of weeks (and can top up with solar) so the proprietary cable is not a big problem.
I contacted Garmin support since I've seen that in some of the cases they offered generous discounts for newer models or even gave them for free, but in my case they offered me to pay almost a full price for refurbished Instinct Solar gen 1, that most probably would have the same issue after some time.