I use an Amazon FireTV Stick on my old non-smart LG TV. And the advantage is that the FireTV has a simple cute little remote control device. There is a nifty Setting in the Amazon FireTV UI to allow its remote to turn on/off the TV too.

So it's been a long time since I had to wrestle with the TV's built-in OS.

I just use the pleasant UI of the FireTV Stick to watch Netflix, Prime, Disney+, etc. on that decade+ old TV. That FireTV becomes sluggish if I keep multiple apps open, so I have learnt to exit out of an app before switching to the new one.

I may get a new FireTV stick this year, rather than splurging for a new TV, since the old TV is still doing well.

As the Americans say: If it ain't broken, don't fix it.