I've been using this A7 (SM-T500) for a couple of years for general web browsing and watching YouTube etc. Works fine. Can suffer from low processing power and shortage of Ram on some badly designed sites, but I suspect that's 90% due to Firefox which, whatever its virtues, seems to be an inefficient browser. If you get a current Tab S and use Chrome, you'll probably never notice any problems.
I've been using this A7 (SM-T500) for a couple of years for general web browsing and watching YouTube etc. Works fine. Can suffer from low processing power and shortage of Ram on some badly designed sites, but I suspect that's 90% due to Firefox which, whatever its virtues, seems to be an inefficient browser. If you get a current Tab S and use Chrome, you'll probably never notice any problems.