... rural land line service in upstate New York (I.e. Schoharie County) is not being updated and will eventually be abandoned ... I figure we will be forced to go wireless but wireless signal is not consistent either. Has anyone who lives rural investigated dropping landline and switching to Verizon wireless? Do you know anything about signal boost that some vendors are advertising? ...
Your area may be rural, but it's certainly not "backwoods." You are in the greater Albany metro region and at least in theory you should have access to a wide array of telecommunications services. However from what you say that does not appear to be the case. I certainly agree that companies like Verizon are not going to be putting much effort into maintaining older networks as time goes on. So what to do?
If I were facing the problem of losing reliable landline service (POTS or otherwise), I'd avoid the "wireless only" route. I'd certainly maintain wireless for general communications and emergency service but for home use, I'd look into VoIP providers.
Over the years I've had a number of VoIP providers. Most recently I used Vonage, and a quick glance at the Vonage coverage map indicates that they service your area. Of course I'm assuming you have adequate broadband service, because that's required for VoIP.