I recently bought a 1019+ based partially on your reviews, and so far so good. I saw your post saying I could bump it to 16 GB RAM (https://www.youtube.com/watch?v=BPU_XEepVfM), but I didn't see a link to buy compatible RAM. I just added a Win 10 VM and it's crazy slow and laggy, so I figured my best bet would be to add RAM. I already have a 512 GB M.2 SSD installed as well. Any help would be greatly appreciated.
I am glad I could help. I have listed Crucial RAM upgrade for ds1019+ here: https://nascompares.com/answer/upgrading-the-synology-ds1019-from-8gb-to-16gb/
So far Synology still seems to allow unofficial upgrades. I hope they never stop.
Either way, I hope this helps.