As kzurro says, RF is the new EF - lenses for Mirrorless bodies and they do regular and L series too.
Quality of RF is better - as there's no mirror in the way the rear element sits much closer to the sensor, shortening the light path and can be placed exactly where the best image quality is achieved for that particular lens design, 2mm or 2 inches from the sensor.
Rear element is also larger so less edge distortion and what distortion there is (the 24-105 STM is pretty bad) is more easily corrected with the in-body processing. I think Lightroom has a profile for that lens too and they'll catch up for others that need it soon for those who only shoot RAW
The 100MacroL gives 1.4x mag and has a 'Bokeh control' ring to adjust the out of focus 'feel' and AF on Mirrorless is faster and more accurate, the focusing is done on the image sensor rather than separate AF sensors so no 'front or back' focus issues or need to micro-adjust / calibrate.
That said it'll be a while before DSLR is dead, there's no crop body (probably be the R7 when it eventually arrives) and there's no cheap camera for the masses or kit lens - if you're happy with the camera you've got and want a 24-70 then just get it and enjoy it, and you'll get a good trade in price for it a few years from now when you go mirrorless
L series are the best Canon do so always worth investing in, if they do a focal length you want/need
They make L series EF lenses that'll fit your 7D and they do RF versions for the new Mirrorless models
Even if you move to Mirrorless, all your current L series lenses will fit with the adapter so you're not wasting any money and you'll still get stunning results
I've got some great lenses, all Canon L series...
16-35 f/2.8L,
24 f/1.4L,
24-105 f/4L
70-200 f/2.8L
100 Macro L
300 f/2.8L
They've cost me a lot and give great results, much better than non-L series - you get better build, weather-resistant, better glass and coatings, better optical design, generally faster max aperture, faster focus motors, better IS systems
If I move to mirrorless when my 1Dx dies I'll just keep using them with the adapter (which is like an extension tube to site the rear element in the right place, no glass and no loss of quality), then slowly move to RF versions
As I said before, if you want the 24-70 f/2.8 then go for it!