Seriously guys, if you don't like the Primaris style/scale models and you really fear that standard Astartes are going to go away in model form at some point, why worry about the Primaris stuff in any fashion and just buy what you want? There's zero need to focus on something that makes you hobby unhappy, and the constant posting about it without something constructive to say (such as "Don't like these models, but can do X with them to make them better in my eyes," etc.) doesn't do anything for anyone - it's just a reminder to you of something you don't like, and it just serves to poke at those who disagree.
Plenty of people play with models that aren't the current scale - I've got an old metal Terminator Captain who has become a Terminator Sergeant and is elevated on a base to get him to approximate correct current height. In the past, I played against a guy that still used a few old Beakie Marines from the Rogue Trader/2nd Edition transition period. Use the models you love, and if you really are worried about them going away - buy some more now, stock up, and later on, buy other people's used stuff that they are getting rid of. You don't HAVE
to use the new scale models.
I like both types of model, and I'm doing my best to bring to fruition a blending of the larger scale with older styling and armor Marks as I can - personally I'd prefer if there was zero difference and the only change between the two scales was the scale, all the weaponry was simply options for Marines, and how you arranged weapon options was what determined squad type.
But using the upgrade to two Wounds for all Marine types to press some sort of "Woe is me, my Marines are going away" idea is just silly. Let's talk about that and what it does for the game. There's more to discuss than your favorite scale of Marines possibly going away at some unknownable/indeterminate time in the future.
I maintain my theory that Kirby set Primaris in motion to reboot the setting AoS-style and got swerved last second when Rountree came in. They still had all the r&d and sculpts on deck, though, and had to release them to recoup costs. Making old marines have parity with them now that 9e is here, along with the graphic design shifting way more towards the neo-90s look seem like things an ascended fan would dictate.
We know this theory is incorrect because Jes Goodwin has stated on camera that the Primaris line was started as a re-proportioning project for Marines - the Primaris concept came AFTER
the idea of re-scaling/re-proportioning.
It's in either the first or second Voxcast Jes was in.