Any reason not to use Windows SSD as additional storage?

I've switched to Linux recently. My setup is dual boot Kubuntu and Windows 10, each on separate NVMe drive. I'm planning to format the Windows drive and use a bare-minimum Windows 10 installation purely as a fallback just in case I need to run something that can't or can't easily be run on Kubuntu, but I want to keep Kubuntu as my main driver. However, each disk has 1TB storage. Given that I can easily access the Windows one from KDE's mounted devices tab, I'm thinking about using it as a location for additional files and thus avoid polluting my main Linux drive too much.

Purely from a technical perspective, are there any downsides to such an approach?

EDIT: Windows 10 disk is an NTFS partition.