Lithuania is already unhooked from Russian gas. LNG terminal in Lithuania can supply enough gas for all 3 Baltic states and there's a massive gas storage in Latvia. All 3 gas grids are well interconnected as well.

Russian gas through pipe were cheaper than fully loading LNG terminal though.

True. But the lack of political will and corruption at all levels is what hampers the process. In my country which lies slightly north of Lithuania, that is huge problem. There, similarly as in Germany former heads of government have lucrative positions in Russia-connected gas companies still.