Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: IB+ Gold, TK E+, Hyatt Globalist, Marriott LTP, IHG Diamond
Posts: 14,170
There is really little difference between Gold and Diamond. Guaranteed lounge access, rather than probable access. I've probably been upgraded more as a Gold than as a Diamond...
I also understand that the question might be hypothetical, but I also wouldn't do a Diamond challenge until early 2022. (assuming that the Gold status runs at least until March 2022)