This is a big issue. There are only a few companies operating in this specific field. You aren't going to find any startups interested in it because making a barebones radio is a multiyear process (to hit all the requirements laid on them from software capabilities to hardware durability).
The established players also have a tendency to layoff or move the experienced engineers after a major update and leave only cheap, inexperienced engineers in their place. So the next big cycle will have mostly people who don't know what they're doing accepting changes that cannot actually be done (in time or budget, if at all) but they don't know better.
I don't think it's "you aren't going to find any startups interested" as much as "you aren't going to find DoD interested in trusting startups to be around". No one gets fired for giving a billion dollar contract to General Dynamics.
The established players also have a tendency to layoff or move the experienced engineers after a major update and leave only cheap, inexperienced engineers in their place. So the next big cycle will have mostly people who don't know what they're doing accepting changes that cannot actually be done (in time or budget, if at all) but they don't know better.