Not a lot of people know this...
Mirrorless cameras are definitely flavour of the month and it will only be a matter of time before this will be the only choice of cameras available. Canon, in particular, are dropping some of their more popular models like the 5D in favour of their R range of mirrorless cameras.
Along with this is their rather expensive RF range of lenses, although the reviews of these lenses are pretty exceptional.
However, to capture their current market they are offering an RF to EF adapter to try to encourage their followers to switch to their mirrorless range of cameras without the initial expense of buying a whole new set of lenses.
What they don’t tell you is that if you use a crop sensor lens, typically the EFS range, the adapter crops the image as the lens is normally incompatible with a full frame camera. This cropping has the effect of almost halving the cameras image size... For the Canon EOS RP this would give an image quality in line with a Canon 450D!!
Giving this limitation, it won’t be long before their followers will feel the need to upgrade their lenses. Quite a marketing ploy... 😔