That's interesting. European countries do have immigrant visas, and I think Canada does too. (As in, a visa that's issued for the sole purpose of letting you immigrate.)
The majority of permanent residents gain their green card through a status adjustment (ie, from a nonimmigrant visa).
Status adjustments are the norm, not some fringe edge case.
The only large category of immigrants that does not come primarily through adjustment are the "family preference" categories for more distant relative such as adult sons and daughters and siblings.
https://ohss.dhs.gov/system/files/2025-07/2025_0725_ohss_leg...
Nice.
So, at least one