My journey so far (wrt irons; won't touch on hot air/plates, dedicated desoldering tools etc. here):
First stop, those old magnetically self regulating, but fixed temperature Weller ones. Similar to Jo22's image, though I can't make out whether that's a temp dial (better models) or a fuse holder (model I had). Given to me by someone who hasn't bothered updating their tools/knowledge in decades. They work but aren't a good experience at all. Do not recommend.
Second stop, Hakko clones. Finally temperature control! Much better experience, but not a lot of thermal mass compared to the Weller, which can be an issue when you have a bigger ground plane. Was alright for a while, but enough friction to keep me looking for alternatives. Acceptable if you can get one for free or cheap; if not, read on.
Third and current one: TS100. My first experience with "next generation" irons, and a great one, especially after you install IronOS (yes, soldering irons have operating systems now). Thermal mass could be bigger, but it's smart enough to read the situation and start actively pumping as much power as possible into the tip pretty much immediately when necessary so it's much less of an issue compared to earlier gens. There's other makes/models that use e.g. USB C for power, but that can be hit and miss - mine came with a dedicated PSU with a very long, very flexible lead which is a pleasure to use. The "next gen" tips for all of these are more expensive though since they now include the heating element.