Call me a pessimist, but I think hams can kiss 900 MHz and above good bye in the not-too-distant future.
I've thought a little more about this topic after my initial post and I find myself agreeing with the idea that anything above 2M will be gone in the next few years.
Here's why I think the end is coming:
The number of hams in the US is a lie.
The number of outstanding licenses do not correspond to the number of active amateurs. Active amateurs who actually participate in the hobby in some form. We have WAY TOO many preppers, church group members, and young people who get a license after a weekend cram course and then simply walk away because they're not interested/invested in the technical aspects of the hobby.
It takes the wind out of your sails when you fire up your Baofang and realize that you're not going to talk to some far off exotic location but on empty repeaters, repeaters filled with non-welcoming hams engaging in conversations that violate numerous rules concerning language and decorum, or simply dead air. Why would anyone want that when you can grab your smartphone which does far more than any HT could dream of?
I would also add that the FCC sucks at culling licenses. Just look at how long it takes to get a license cancelled after someone dies and that's if the family even informs the FCC. I'd bet that a good number of licenses currently "active" belong to amateurs that died a while ago. 10 year licenses leave a lot of slack.
Let's talk demographics about who holds a license.
There is no way in any circumstance that anyone could convince me that the average age of an ACTIVE licensed amateur in the United States is younger than 55 years old. The explosion in Technician licenses (and overall amateur numbers) is meaningless when it comes to who is actually going come to the plate and take a swing if this hobby was threatened.
I've seen it with my own eyes for 23 years now. I got licensed back in 1997 because I was a weird kid who liked electronics and happened to stumble across a flier for an upcoming hamfest/testing session in the electronics section at my local library.
I only need my own personal experiences throughout the years to show me that this hobby has always skewed older. Visits to hamfests, swap meets, various clubs, and "social" gatherings have all had me as one of the youngest in attendance if you leave out someone's relative or the newly minted 9 year old amateur who will quickly forget about ham radio once pop-pop passes away and/or the teenage years hit.
We're a dying hobby. It won't be tomorrow or even next year but drastic changes are coming. The numbers won't be there to support any kind of meaningful advocacy for our current frequency allocations above 420 MHz. Don't put your eggs in the ARRL's basket. They're about as useful as a fart in a windstorm given where the FCC's priorities are these days. Your Senators and Congressmen/Congresswomen? Amateur radio....WTF is that? If it's not a hot topic issue, you're getting a form letter saying how very much they appreciate you contacting them and to drop dead.
TL;DR summary - We will lose anything above 2M shortly due to an aging amateur population and our hobbies inability to make a connection to younger generations largely due to advances in technology and societal attitudes towards how people should spend their free time.