You're right to be fair, a lot of them do retain that shape for purely aesthetic reasons, but it's not a functional part of the light source any longer.
I mean, they are just small diodes inside, if they have a bulb shape it's just some plastic to have it be a familiar shape. I'd even argue most new light fixtures these days come in all sorts of shapes, and in my home, for example, I don't even have a bulb shape.
Not quite all : I don't think LED's can withstand the heat of an oven. Though I don't see the need for a 200W bulb in an oven. Maybe as the heating element in a toy easy-bake oven?
I think they started marketing them in "equivalent wattage"
I got this one crazy 10k or something lumen bulb a few years back - I set it up in the corner of my room. There were no shadows. Just total darkness to high noon at the equator. I wired it up as part of an alarm clock.
Instead of little squares of LEDs, it was strips of them facing out in a twisty bulb. I want to say it was something like 15 watts
An enclosed bulb with basically no heat sink and no chill is probably not a great design, it didn't last long. It was cool though
Incandescent bulbs over ~75W are banned in the US now, with a (glaring) exception for heat lamps. There are some shady manufacturers labeling ordinary high wattage lightbulbs as heat lamps to get around the restriction, but you'd have a hard time finding any of those in a big-box store.