A meter lets you determine the dr in a scene
A meter helps you measure lighting ratios
A meter helps you set up a studio flash manually
A meter can measure fir incident light, a camera meter alnost exclusively measures reflected light, reflected by shades and textures assumed to be matte assumed to be 18% gray but usually aren't
99% of hobby photographers, even very serious very capable hobby photographers have no real need for a light meter.
If you can appreciate the difference between light that falls on a subject snd light thats reflected from a subject then tou can probably sppreciate the need that some people need for a light, even if you are unlikely to need one yourself,
I think most hobby photographers have some need for a light meter (anyone who shoots 4x5 needs one for sure!), but I think to some extent that anyone who wants to wait on light or modify light (strobes) should really consider one whereas someone who just wants to shoot what's there and get the best exposure should use the in-camera meter, as they are so good and you have instant feedback anyway.
Features depend on what you need. I have the 758-Cine, but most serious landscape photographers use a Pentax Digital Spotmeter and most serious videographers use Spectra meters, which are considered more accurate as incident meters than Sekonic.
I love the 758-Cine, but am easily impressed.