It eventually did get nearly full driver support, the last pain point i had on WinXP x64 edition was ASIO4ALL, for years the author said, paraphrased, "I will never support 64 bit OS" - although it works fine on win7 x64 and up.
The drivers that never worked correctly were industrial and "weird" things like radio programmers, stereoscopic headsets, and limited run PCI[e] cards and specialized USB peripherals, but most of those had issues with XP 32-bit as well, and never worked past XP, in general.
The drivers that never worked correctly were industrial and "weird" things like radio programmers, stereoscopic headsets, and limited run PCI[e] cards and specialized USB peripherals, but most of those had issues with XP 32-bit as well, and never worked past XP, in general.