An R8 is the smallest Canon full frame. If you need smaller, R8 is not the way to go.
Agreed. But it seems that Canon will not be releasing any fast glass (< f/2) for the RF-S cameras. So until I have better clarity on this, the R/RF series is off the table.
An M kit with a couple of zooms and a good prime is terrific for travel where size/weight are important.
Agreed. I just came back from a hike carrying: Canon M50, Canon EF-M 11-22mm f/4-5.6 IS STM, Canon EF-S 55-250mm f/4-5.6 ISII STM, Canon EF-M 22mm f/2.0, Canon EF-M 15-45mm f/3.5-6.3 IS STM, Canon EF 50mm F1.4 + Canon EF-EFM adapter.
The total weight of this kit was 1.6kg and it was just about comfortable.
If I replace the EF-2 55-250 with an EF-M 55-250 and replace the EF 50/1.4 with the Sigma 56/1.4 then add a Canon 32/1.4, I'd end up with a kit that weighs about the same.
Canon M50 is 390 gms
Canon EF-M 11-22mm f/4-5.6 IS STM 220 gms
Canon EF-M 55-200mm f/4.5-6.3 IS STM 260 gms
Canon EF-M 22mm f/2.0 105 gms
Canon EF-M 15-45mm f/3.5-6.3 IS STM 130 gms
Canon EF-M 32mm f/1.4 STM 235 gms
Sigma 56mm f/1.4 DC DN 280gms
If I had a Sigma 16/1.4, I'd have to choose between carrying it or the 56 1/4 + 22/2.