I suppose it depends on your data size. If it is small data at very high speed yes it will be close to 4k random. If it is big files, probably not.
If saving speed is that important maybe think about compressing data. The other solution would be to have a second SSD and write on both simultaneously







Then they should just use a profile. No account needed, you can just have your own tabs. And if you bind to an account you access everything you started from another device