I think it very depends on your hardware. I, personally, never had problems with it, on thinkpad which I use right now WiFi drivers were out of box even in Gentoo minimal ISO(It uses iwlwifi). But, every hardware that I have is about 10yo. And I think I haven't any non-intel WiFi-cards.
But also one of my friends had to compile drivers for his card manually from github, and second friend had issues with his WiFi constantly disconnecting which we couldn't solve.
That might also be a general network drivers vs. kernel version problem as well. I've had that on some Ubuntu falvors on various cards, it isn't specific to just wi-fi, it happened on lan as well (just disconnects for a few ms and then connects again).
And yeah, one of the many reasons why I usually buy second hand hardware as well. One, it's a lot cheaper, two, drivers for Linux are usually not a problem 😁.