This is what a lot of people are overlooking.
The conflict in Ukraine has turned into a an attritional grind for all parties. It's occupying practically all of Russia's deployable military and severely depleting their stocks of ammunition of all types, and it has completely exhausted their reserve armour and motor pool.
If the Ukrainian conflict ends in a peace agreement, Russia will be able to recover their reserves in a few years, and then their focus will turn to Estonia, Latvia, and Lithuania. Due to the difference in sheer scale, none of the Baltic States will be capable of resisting Russia in the manner Ukraine has, and as for anyone still thinking that NATO will respond en masse to an attack on a Baltic State member, you must be delusional.
Nobody is getting into a hot war with Russia to defend Estonian or Latvian sovereignty, Putin knows this, and it's precisely why he would invade a Baltic State in the first place. It isn't about grabbing territory, it's about the fact it would break NATO and effectively bring about its end as a going concern. The entire precept is mutual defence, and if NATO proves it is not willing to back that precept up when push comes to shove, then it ceases to serve any purpose whatsoever.
It's clear the US would already be reluctant to provide the NATO logistical support that has always previously been relied upon should Russia pick a fight with a minor NATO member along its border. Without that support, even the bigger European NATO members are extremely limited in what they could do to resist or repel a Russian invasion of, for argument's sake, Estonia, so in the meantime the only viable option is to pre-emptively turn the Baltic States into perpetually NATO-occupied fortresses in the first place, and nobody really wants to foot the bill for doing that either, even assuming the Baltic nations agree to the idea, so in reality they are going to be left to the wolves.