Upgrade from Gen4 to Gen5 was a snap, working well
I was sent the new HT2000W modem, hooked it up, waited the prescribed hour and all is good. I happened to already be on SAT 17.
It's been two days, sitting right at 30+Mbs down and 2Mbs up with testmy.net. Definitely snappier. Located near Lake Oroville CA. Historically I use this for backup to a wireless ISP I use in Chico. They do drop out once in a while so the backup is required to keep my employer in the Bay Area happy.
While the built-in wireless works fine, I won't be using it as all data needs to pass through a security device between any isp and client systems here.