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I run Opnsense on a Proxmox VM (I followed this guide). I’m quite pleased with it. Opnsense is probably going to be more secure than any consumer router firmware, and you’re going to have to make a bigger upfront investment in hardware. I had never used Opnsense prior to using this system, and the fact that I’m running it on Proxmox is a huge benefit. If I’m ever about to do anything I’m unsure of, I can snapshot the VM in Proxmox. If my router config breaks as a result of my tinkering, I can easily restore from the snapshot.
It’s not that bad. A traditional yogurt-making practice is to put a couple ants into some milk. The microorganisms and enzymes that the ants introduce helps kick off the fermentation of the milk, turning it into yogurt.