[JamieMurph25]

Looking at the schedules today though, even turning RTÉ1 into something PSB only would be a struggle, and require increasing programming budgets due to the sheer amount of repeats and imports propping up the main channel. I’d argue against classifying the Late Late as entertainment though (so I’d keep that on RTÉ1). 
[...]
Shifting commercial output to just RTÉ2 also risks alienating demographics. If that happened, I wouldn’t be shocked to see an RTÉ2 skewing younger and more entertainment heavy and creating an RTÉ3 skewing older and more international drama heavy.

I mean this would be like KBS in South Korea, with KBS1 commercial free (since 1994 following a revision of the licence fee over there) with mainly news and fewer entertainment shows, while KBS2 in mainly entertainment and sports shows and few news programming and it runs commercials

Also the idea of creating RTE3 for older viewers reminds me of when the Czech public broadcaster launched CT3, it was a temporary station for older viewers and it was on the air during the pandemic, closing in the first minutes of 2023. But personally, my best bet for RTE3 would be a cultural station.