I wasn't trying to say you did say either of those things I was simply saying that it could be way easier to find what OP wants with Intel CPU's.Never said it was common but there are more and more OEM’s going with AMD even custom builds like Eluktronics, most of these are available with a AMD CPU.
Also never said mobile series was series was a huge improvement but it is a improvement nonetheless and was just stating my opinion like the OP was asking.
In regards to RTX 30x0 mobile variants, as you say, there is an improvement in IPC nonetheless, but the knowledge that it is not as big of a leap as it was on desktop makes it easier to grab a RTX 2070/2080 mobile deal now.
That makes sense. When you're dealing with a power limit a bigger chip would mean lower clocks.3080 Mobile and 3080 Desktop aren't even the same GPU, so it's not a very good comparison. 3080 Mobile is basically a higher binned 3070 (48SM instead of 46SM).
But regardless of chip branding, it still means performance from this generation will not be as high comparatively. So waiting for it might not be the best move, if there are Laptop PC's with 2070 or 2080 mobile parts on sale.