As a developer it’s impossible to import .wav files directly to Roblox. Third party conversion methods must be used. I work in .wav 95% of the time. To streamline implementation of sound files, Roblox should accept the .wav format, and automatically convert them into .ogg before upload.
Some .wav to .ogg conversion methods are open sourced in publicly accessible freeware (see Audacity).
Some DAWs are not capable of directly exporting to to .ogg or .mp3. Many soundpacks for sale online come in .wav format, in my experience the vast majority. Roblox automatically converting other file formats to .ogg would be a handy inclusion, possibly within Studio itself, before the upload even occurred, since .wav files are relatively large.