Orthodox conversions are the only ones that produce a Jew under Jewish law. The movements that do not hold by Torah law produce LARPers. (And many of those LARPers go on to realize they’re not doing the real deal and then decide to go for an Orthodox conversion so they can.) That said, while non-Orthodox conversions aren’t acceptable to the rabbinate for sacraments like marriage, they often are for the sake of aliyah (moving to Israel). The politics of the rabbinate’s dynamic with the government is a massive clusterfuck of controversies that they’d need a whole subforum for discussion.
yeah, they make it as difficult and time consuming as possible, if ur going this path, ur going all-in
People bitch about how difficult it is to convert Orthodox, but it would be a huge sin to allow someone to convert before they understand the commandments they would have to keep as a Jew. One of the reasons Orthodox conversions take so long is because the rabbinical court wants the person to experience an entire calendar year of Jewish holidays and lifecycle events as a part of their chosen community. I know many converts and each one has said that they only had a slight idea what they were getting themselves into before they went through that year, even if they thought they were fully informed when they started.