I used to fall for that logic that an ISP would keep my router up to date. It doesn’t happen.

In my case I had the same ISP router for over four years and there was a known bug streaming video. I didn’t have privileges to update and they refused to. Nor would they replace my router with a current one because “it’s not broken and hasn’t yet reached the age we switch them out”.

My solution was to stop renting the router. Also stop renting set top boxes and drop phone and cable service. I’m much happier with only internet for however many years that’s been and I have more control over keeping my network up to date and configured properly