I did the same thing, 64 GB, offloaded photos to iCloud, it worked for about 2 years, then it became a constant struggle for the next 2 years. Could not install updates unless I deleted a bunch of apps first. Let iOS manage which apps are installed? Great idea, flawed in execution. It would delete apps that I never open but are necessary for some Shortcuts to run. Also the apps themselves don’t use that much space, it’s the data they store. Now I have 256 GB. I think 128 might be fine but I thought the same thing with 64 GB back then.
I did the same thing, 64 GB, offloaded photos to iCloud, it worked for about 2 years, then it became a constant struggle for the next 2 years. Could not install updates unless I deleted a bunch of apps first. Let iOS manage which apps are installed? Great idea, flawed in execution. It would delete apps that I never open but are necessary for some Shortcuts to run. Also the apps themselves don’t use that much space, it’s the data they store. Now I have 256 GB. I think 128 might be fine but I thought the same thing with 64 GB back then.