More RAM means less compression, fewer SSD writes.

Yes, upgrading RAM does help with Windows memory compression, and that can reduce SSD writes.

Windows uses memory compression to fit more data into available RAM. When you’re low on RAM, it compresses some pages — that takes CPU power and can increase writes to the pagefile on your SSD. More RAM means less need for compression, fewer pagefile hits, and less wear on your SSD.

It’s not a huge difference unless you’re constantly running near your RAM limit. If you are, a RAM upgrade will noticeably smooth things out and might extend your SSD’s life. If you’ve got plenty of headroom already, you won’t see much benefit.

That said, if you’re buying a new PC or upgrading, the extra RAM is usually worth it for this reason alone — plus everything else runs better too.