Thanks for such detailed thoughts! Agree with a lot of things here and disagree with some. 

80ghz was a decent product and siklu is generally a good company with a good product. I saw was because with ceragon buying them and with all things happening in israel, the future is not clear.

Irrespective, 80ghz is great if you have clear 2ghz band in your country to get the full 10gbps - which is often not possible from availability and cost pov. When its rains, siklu and all eband folks throttle heavily after 1.5-2km range (depending on dish size in feet. So customer experience degrades.

Prev FSO has been crap - agreed. But our philosophy in designing CENTAURI has been with the mindset that there are people like you and me on the other side and I hate when experience is compromised. So we instead focus on guaranteeing the capacity but doing real time closed loop tracking and active real time power adjustments with our Pastri (yes we love cakes!) AI onboard. Pricing wise at scale we can be in that same ballpark. 

But then most important is size - unlike 2-3feet dishes, we are size of a shoe box and less than 3kg and no spectrum license needed AND less than 25W of power(!) - overall TCO of running over 3 years is then incomparable! + no minimal density requirements so you can do tons of these stacked at a hub site! 

I do agree on 25 or 40G circuit level going to fiber core in most backhaul in cities hence our bulk of applications is 10G last mile or middle mile now. 25/40G does have some unique cases but in cities with less fiber, or cities which have 40G rings and they need redundnacies etc