Hardware

As Intel themselves confirmed, 18A lead product(E core Xeon and Panther Lake) won't be out until mid to late 2025. So either they keep using N3 and launch LNL in late 2024 or delay it by a year with a risk of even further delays and have it launch alongside with M4, QC's second gen X chips, Refreshed Zen 5 APUs , etc. 20A is probably similar to Intel 4 in that it's not really a complete node.

Also they also have to use all the TSMC N3 allocation they bought up for something. Since Battlemage is rumored to make use of N4, Celestial should be 2 years after BMG per usual GPU cadence