Excellent news! The last time I tried to take the RER (early 2010s), I was in a train full of graffiti, with drunks (or drug users?) passed out across the seat

Excellent news! The last time I tried to take the RER (early 2010s), I was in a train full of graffiti, with drunks (or drug users?) passed out across the seats, and few escalators/lifts for my 20kg suitcase. So after this I thought it was less painful to pay for a taxi, the experience put me off trying the RER again. This round, the problem was a strike which surge priced the fare into 8 minutes ETA and 2x the usual. It's funny that CDG is actually a TGV station - you can probably reach other cities faster (and more comfortably) than Paris as a result.