I work on an extra long IKEA LINNMON 16353 in black-brown, which I believe now is the IKEA LAGKAPTEN 604.870.17 at 78 3/4x23 5/8 ".[1]
After over a decade, the cheap veneer is wearing down in inelegant, but a charming "used" fashion.
The funny thing is, if I wanted this desk, I could just go down to the Home Depot or better yet, a woodworker specialty store and bolt an aluminum framing system to plywood I can get cut at the IKEA LAGKAPTEN dimensions above, and have a superior product.[2]
Seriously, if you want this at nearly a 10th of the cost, just go to a local woodworker store, buy some RTD plywood, or the plywood of your choosing, and search for an aluminum framing system and buy that and bolt it to the thing.
That's seriously what they're selling you.
Actually, what they're really selling you is their aluminum framing system. That's what you're actually buying. The plywood is an afterthought.
[1]: https://www.ikea.com/us/en/p/lagkapten-tabletop-black-brown-...
[2]: https://www.homedepot.com/list/view/details/shared/31f43060-...