Yeah, it felt like a bit of a dumb suggestion for someone in your position. Might work for someone with a less…robust level of need? Works for me with a QNAP QSW-2104-2T (this doesn’t meet your criteria fwiw, unmanaged, not sfp+ but there is an sfp+ version that’s still unmanaged) does that really matter if you have a pfsense box?
Edit: QSW-2104-2S is the double sfp+ version.
Thank you for explaining, as that’s really helpful for my own learning