Trade my Canon 6dii for Canon M6ii?

I considered getting an RP for a short period of time to use along side my M6II as a light weight travel kit.  They use the same batteries and both have in-body charging which was part of the weight saving calculation.  And I really like the focus stacking ability.

Then reality set in.  I save very little weight vs using my 6DII and EF-24-70 f4 when you consider the needed adapter.  The RF 24-105 f4 is heavier than either my 24-105 f4 original or the 24-70.  These are my landscape/travel lenses and I'm not going to settle for an f7.1 lens.  The RF L lenses are expensive and add nothing to my current L lenses IMHO.  I've decided to stick with my EF system as long as I can.  This is my preference.

However,  my light weight kit is an M6II + 11-22 + EF-S 35 macro + EF-S 55-250 (or EF 70-300 II).  Plus the Canon G1XIII.  The G1X is a wonderful 14 oz APS-C camera with a better 24-70 equivalent lens than anything available natively for the M.  Often I leave the 11-22 home since the G1X has builtin panorama stitching in-body.  So about 4 lbs total kit weight.

I still usually take my full frame camera (5D4 or 6D2) for travel.  They have real batteries and better ergonomics when I can afford the weight.  They have better ultimate IQ than APS-C sensor cameras.  But in normal lighting situations its very difficult for me to tell the difference.

Different topic:  Someone mentioned trying to find a list of lenses that automated focus stacking wouldn't work with.  I've only used my M6II for this but I can say that I haven't tried a Canon lens this wouldn't work with.  I assume its the same with an RP.  I really like doing quick hand held focus stacks with the 55-250 since it focuses close but has more reach than typical macro lenses.  Great for flowers, and small critters.

Just an opinion to consider.