Your post is mostly right. I haven't read the article itself (paywall) but I already knew about this particular issue through work. You've touched on a lot of

Your post is mostly right. I haven't read the article itself (paywall) but I already knew about this particular issue through work. You've touched on a lot of the "pull" factors that cause the Baltic states to connect to the EU. There are however a few geopolitical "push" factors that cause Baltic states (particularly Lithuania) from staying dependent upon connections to Russia. The Lithuanian grid has been able to rely on energy from Russia due to the Kaliningrad enclave being dependent upon the Lithuanian grid. Russia has recently been making investments into making Kaliningrad energy independent. If this is achieved, Russia no longer has a vested interest in the security of the Lithuanian grid. Given the history of alleged Russian sabotage of Lithuanian infrastructure (other than electrical), there is considerable fear that once Kaliningrad is energy independent that Russia may sabotage the Lithuanian grid. Therefore Lithuania is rushing to connect to the EU grid before Kaliningrad achieves self-sufficiency.