As the title states.
Both myself and my parter are avid gamers.
All 4 kids are also gamers, but watch Netflix etc. too and with our current connection, all is fine.
Our main concern is that we both are remote workers and work from home, anything that throttled our internet connection would become unsustainable to us.
Some sites say that 70mbps is pushing it, but should be okay, others say it’s completely untangible
Any advice is greatly appreciated
You’ll be fine. I’ve lived in a house of 5 (student housing), all pretty big gamers, on a ~68mbps connection (UK broadband sucks). It was completely fine most of the time, with some occasional lag when a couple other people were doing bandwidth heavy things (like torrenting or downloading Steam games).
Perhaps in your router you could set QoS rules to prioritize traffic to your work machines during work hours.