TE3 is the "old interface", and TE4 is the new(er) interface.It's been a long time since I've been around here, but I've been with Tivo since almost the beginning. I think 2000. I currently have a Roamio Pro and got the message about losing suggestions. I'm still using the old interface and never switched to the new experience. We actually do use suggestions at times and have found a few good programs from them.
Exactly what is TE3 and TE4?
Is it time for me to upgrade to a newer model? Frankly, I'm less interested in having all those internet services on my screen than being able to search, find, and record via a list of available options. I hate the netflix and prime video boxes for searches.
If I do go for a new model, which would be suggested that is comparible?
If you're running the old interface, and are happy with it (and you like suggestions). your Roamio Pro is probably the perfect Tivo for you. The newest Tivos don't even support TE3, so you would be going backwards by upgrading to a newer model.