They are. But it’s because the CRT’s aren’t made anymore, not because it’s a safety/usability issue. There are a few other upgrades that will go along with the CRT’s - supposedly including the WX radar. The problem with installing LCD screens is the analog screen cables will either need a converter (one vendor has that built into the screen), or a rewire of the cockpit.

The timeline is still pre-decisional. It may be as fast as 5 ships per month, but it will still take years to retrofit them all.