Yes, I should've added - whether the write speed matters depends on your own use case.
For my SMR drive, it's taking roughly 2GB of backup files every few hours, in the background, and there's plenty of empty space on the drive. In my case, it doesn't matter at all.
However, if you're sat at your computer, frequently transferring large files while the drive is at least half full, and you have to wait for completion... Then it'll matter.