Area-51 R5 CPU and GPU upgrade questions

Hi all. Now that the Area-51 R5 desktop is no longer being manufactured, I have been looking at a couple of different confirgurations to grab but I am concerned about future upgrade options. I'm currently looking at the older base model that shipped with the i7-7800x and a GTX 1080ti and the newer model that shipped with the i7-9800x and the 2080ti. (Both are R5) Will these models be compatible with the newer 10th gen intel x299 CPU's that are coming out soon? Will it require a Dell Bios update to enable compatibility? And will Dell allow that to happen? If they do, will they do it for both the older R5 running the 7th Gen chip or will they only allow it for the newer R5 that came with the 9th Gen chips?

Same question for the GPU, I know I could upgrade the 1080ti to a 2080ti but will these machines support the next GPU releases from Nvidia or will this generation be as far as they go?

I have been in contact with a rep at the Dell outlet and I would like to buy 1 of the models I mentioned above but not if they will be end of line and unable to be upgraded past the 9th gen CPU's or the current gen GPU's. Any help would be greatly appreciated.