Let me be a bit more specific. If you are doing a couple of light services + jellyfin, maybe you can pull it off. But if you have some critical latency sensitive applications + jellyfin, it can cause issues at random times. Also, if you are ONLY hosting Jellyfin with no *arr stack, you should be fine. I made that mistake and my Pi went down to a crawl. Test your services together, and based on that decide on the subset of services.