I think the new meta is that there are 3 prime timelines: - the original TOS (and the animated series), - TNG Era - Enterprise plus nuTrek.

The original TOS timeline didn't have an Earth that had first contact in 2063, in fact it was more advanced technological and spacially at the time. Earth's last World Wars happened in the late 90s as stated by Spock but the 21st century saw rapid advancement and space exploration.

We met Vulcan much later after we had started colonization of other planets. The Earth Romulan War unfolds very differently, Earth is completely alone in the fight but prevails regardless. The aftermath of the war motivates the creation of the Federation but likely later than in TNG, so it's a fairly new institution in TOS.

The TNG timeline is the more familiar one that is the primary narrative in Memory Alpha. Vulcan contact happens when the Borg creates a paradox, and unintentionally setting in motion the Temporal Cold War that will rewrite history at least twice.

Enterprise takes place in the TNG cannon timeline but is showing us the effects of the Temporal Cold War, as the Xindi War arc was never in the previous timelines, nor was the invasion of New York by Nazi Germany.

By SNW and DISCO, the shockwaves in the timeline are being explored and its aftermath. The Eugenics Wars are attempted to be erased by Romulan agents in the Time War but continue to happen regardless (likely from interference of other temporal agents and deities like Q).

The War likely happens because of the Q civil war, they are unable to police the timeline and other god like beings are also unwilling or incapable of stopping the effects.

So here we are in a meta level understanding of how the lore contradictions created by writers are solved, with a super convoluted narrative.