I bought the 2 TB Google One plan a few weeks ago, as it was time for me to either move onto a different Photos platform or fully commit. I came from the Pixel 1 with supposed "forever" unlimited original Photo quality syncing, but even when I tried to trick Google when backing up my photos from the Galaxy Note 10+ synced to the Pixel 1 via SyncThing, they were still taking up storage space.
I hate subscribing to anything, but Photos is just so far ahead of everything else like it. The 2 TB plan gave me 10% back in-store credit on my 2x Pixel 6 Pro / 2x Buds A-series purchases. I could probably go ahead and buy another two years' worth of 2 TB Google One with that credit - we'll see.