As I have posted previously, radio system salesmen have to eat, too. The support cycle for hardware systems of all kinds is now approaching that of software. Knowledgable people on this website have long used 20-years as the outside number for systems life cycles, sometimes called "useful life" where parts and service are reliably available. Of course, this is predicated on buying the system when it is newly introduced. Waiting for it to be proven as an effective system in other deployments only reduces the time you will have when you make a buying decision. The manufacturers, systems engineers, and sales forces use this to pressure relatively uninformed political bodies.
I think this is a big point many who aren't nor haven't been involved with consulting or implementing these radio systems miss. Today's vendors, and not just MOTOROLA, are accelerating the life cycle of their entire product lines.
10-15 years ago, 20 years was the norm in LMR. Today, we see that number cut in half by the vendors not supporting the products after 5-7. This is true for ALL the major LMR players, not just big blue. Try getting Kenwood to provide support for your TK-250G or TK-880s, I've got a Kenwood dealer account and an MOL account, and I see the monthly "EOL" products list, and both are surprising with fairly current products being added.
When it comes to infrastructure this is a major problem. Smartnet trunking, for example, is still widely used- and being fairly robust, it's a staple in many areas. Motorola has kept it alive for close to 30 years. I personally like it, but the reality of it is trying to keep a mutl-site simulcast Smartnet II trunking system on the air with failing cards in CEB's, master clocks that aren't made anymore, and fewer and fewer controllers on the secondhand market, it's a prudent decision to replace such clunky infrastructure.
The one thing that hasn't changed with the shorter life cycle in many cases is a lower price. This isn't the case of the software industry who has lowered it's prices (even Microsoft). And this I think is the major objection many have, including myself. There is much markup on these systems.
I have a feeling Hytera and the other Chinese manufacturers can flip the script once they get serious and start pumping out infrastrcuture.