In hypersonics Russia currently has a lead over China. Obviously they're going to catch up rather soon.
eleitl
Russia has that too, nevertheless Kinzhal and Kalibr (which are lower-Mach and don't carry a hypersonic glider stage) are both about 10 MUSD. Just the costs of JP-10/decilin are considerable already.
Depending on the specs, I'd assume the price to be a few MUSD, never under 100 kUSD.
Fat nodes on fast low-latency pipes ran on dual-stacked servers 24/7 reduce ephemeral node churn and aid in node and content discovery. Mobile devices on P2P behind CGNAT and other brain damage are more a problem, than a solution.
I've read analysts who say that the price is unrealistically low. I think the same.
I have a Pixel 7a with GOS in airplane mode, with WiFi only. My old phone with the sim inserted is on Lineage OS and hasn't fully (has a case of occasional ghost touch) died yet. I only use the old phone for cellular telephony.
Yeah, it doesn't scale. Most of the surveillance (legal intercept, SINA hardware on ISP) and injection of government malware will be through the hostile network. People who run a tight ship will have a small attack surface.
You should switch to opnsense, not pfsense.
If corporate wants something, they can provide corporate phones. I keep company and private strictly separate.
If it's not self hostable open source that's a hard NO from me.