Although it does make me wonder a few things:
1.)What did all the AI additions to RDNA3 bring to the table? Seems a pretty pointless uarch upgrade,if it is simply acting like a bigger RDNA2.
AMD originally didn't take AI/RT etc seriously, the CEO even went on the record I recall stating that it won't be that popular. They just didn't plan for it then got caught empty handed when NV ran circles around them with AI tech (DLSS) in actual games.
2.)Why did Nvidia go a route for FG,which made an RTX3090TI not run it,but an RTX4060 could?
You'd have to look back on the history of the components that frame gen uses. optical Flow Accelerators are used for this and on the RTX 20/30 they were early revisions that were not efficient which is why it was never backported to those cards. Since NV FG uses dedicated hardware (The OFAs), the next gen of OFA was needed, whch is what all 40 series cards have and they are more efficient. This was an NV dev engineering discussion on an interview a while back as well discussing it.
It would actually do more damage enabling it for older RTX cards only for people to moan that it runs like crap.
The OFA hardware is also used in many things not just for gaming frame gen, in the professional space video encoding benefits it too:
The Optical Flow Accelerators behind Nvidia's new DLSS 3 feature won't just increase video game framerates. Content creators can also use the technology to artificially increase framerates...
www.techspot.com
3.)Is AMD waiting for RDNA4 to release,to actually update FSR and will it be locked to that generation? But if it needs specialised hardware,then what was the point of RDNA3?
The last round of leaked info suggested AMD were looking at dedicated AI to do some stuff, so maybe FSR branches will require specific HW, and RDNA4 will have a gen of that HW that is capable, like how OFAs are only erformant on RTX40 and above even though RTX20/30 have them, just rubbish versions of them.
Edit*
My feeling is that AMD internally wish it never made FSR open to all. What it has done is allowed those who were on RTX30 cards, still very capable, even more capable and outshine RDNA cards further. Those 30 series owners that might have jumped ship to RDNA3 chose not to because hey, they can do frame gen after all thanks to AMD.
I don't think AMD will make the same mistake again and just like NV requires an RTX card for DLSS tech, and Intel Arc cards are needed for the full XMX quality instead of cut down versions of "universal" XeSS. If you want full quality/performance, you need proprietary HW, that is the long and short of it, and it's also why FSR still has these issues.