El Salvador probably wanted to keep their image as a bitcoin friendly country. Not only do they want to appear friendly to bitcoin, it seems like they want to be a country known for having a lot of bitcoin and possibly get investors in their country. I have seen some people doubt IMF's reports but what do you think? It makes sense if bitcoin has become El Salvador's political move.
Want to maintain it or not, it is not important and you should know that life is unpredictable so El Salvador can not predict everything and their initial plans can be changed many times, with adjustments to continue their plan of accumulation or completely stop their accumulation.
There is nothing to say bad words about El Salvador if they, by reason, stop their Bitcoin accumulation entirely or slow down their accumulation from daily to weekly or just randomly.