I admit to being tempted a few times by the RF 24-240 for travel. I'll further admit that I'm a bit tempted to order one before I leave for my trip next week.
However, I will resist the temptation. I know from past experience that most of my travel shots are at 100mm or less, as you state above. When I need longer, it's usually much longer and for that I will be bringing the RF 100-400. The wider end is more important for me, thus the RF 14-35/4 is part of my core travel kit as well. I will be indoors part of the time, and while I bought and will be bringing the RF 24/1.8 mainly for that use case, with DxO RAW conversion and the ability to shoot comfortably at ISO 25600, f/4 will often work indoors whereas the stop lost above 70mm with the 24-240 will push it over the edge.
So, my 'walkaround' kit will be the R8 with the RF 14-35/4, RF 24-105/4 and RF 24/1.8 in a Think Tank Retrospective v2. I'll also bring the TS-E 17 and the RF 100-400, for selected outings during the trip.