I can't speak at all for 'modern' BT routers as the last time I used one was back in 2015 with a homehub5. I learned long ago that ISP routers are in my very useless opinon, garbage, but, they're plug and play and most households just want something that they can connect and go. My last BT router went back to BT still in the box with the sellophane on unopened four years after receiving it. I never wanted it in the first place.
What I have used now for the last 3 years, is a TP-Link GX90 which has so far served me well. I've got about 25 devices constantly connected to it and it never ever gives me a problem. Used for 3 years on BT fibre 500 on FTTP and now on PN.
