Update.
I did the Verizon 300/300 upgrade a while back and did demote my G1100 to just wired duties. However I have decided that my single TP-link AC1900 (placed in the basement) is not providing me sufficient range in all the places. I moved it to the second floor from where it was in the basement and did a wireless survey with my laptop (which seems to have better reception than my phone due to physics) and I can report that at least inside the main house + basement, speeds are acceptable.
In short, the download speeds in the main house + basement ranged from 223 to 309 Mbps across the 12 test locations. Uplink in those same locations ranged from 100-280 which admittedly is a wider variation.
However, when I moved to the garage, and outside, things got pretty bad.
Across the 1 garage + 6 outside test locations, download speeds ranged from 18-55. Uplink ranged from 18-66. I should caveat that it is considerably worse on my phone so I should redo the test with my phone.
I did a lot of research and while I was tempted to move to a 3 node mesh setup (Wifi 6 or 6E), I got scared. Actually, I realized that my TP-link AC1900 actually supports TP-link's OneMesh which means I can use TP-link OneMesh extenders and rather than having a dumb wireless repeater (which they also support), I can have a mesh-like single SSID network, but with extended range. That's what I want. So I ordered two TP-link RE550 (AC1900) extenders @ $60 each.
I know I don't need 300/300 in these locations. However, like I said, my phone is worse. In fact I did some quick testing yesterday and near the mailbox with vegetation blocking line of sight to even my upstairs router location, I got well under 1Mbps down. I just need that to be better and I am hoping an extender in my great room will bump up signal strength to the driveway area side of my house. I am also hoping that the second extender placed on the opposite side wall will help with the yard side of my house.
https://www.amazon.com/TP-Link-Extender ... 116&sr=8-1
However, there is a problem.
I have this router:
https://www.amazon.com/gp/product/B07NF ... UTF8&psc=1
Yep, AC1900. But wait, it's an Archer A9.
Looking through the marketing materials, it turns out the A9 (older hardware) version of the AC1900 does NOT support OneMesh. Dang it!
So I decided to double down on this older setup and ordered the Archer A8 version of the AC1900:
https://www.amazon.com/gp/product/B08C3 ... UTF8&psc=1
It's only $60 and does support OneMesh. So for $180, I'll have the thing I want, maybe?
Problem is for $180 I probably could get into a 3 node Wifi 6 mesh setup, so it's unclear if this is the best use of resources. Meh. At this point I will just configure all the things and see where I am at wrt functionality (and reliability) and if there is a show stopper, I will simply return everything and re-group (and maybe consider a mesh system).