Based on RE's past, I have to disagree, hear me out.
They produced the old Iron Barrel engine and it's "replacement" the newer AVL Lean burn engine at the same time for ten years. Production of both of those overlapped with the Unit Construction Engine (which replaced them both) for a year.
Imho the 410 and 450 Himalayans will be sold side by side. The 410 as the standard and the 450 as the ( more costly) next tier upscale machine.
One thing we've seen for sure is Enfield wrings every Rupee worth of return out of their investments in R&D and tooling before scrapping it.
Also worth mentioning is early on in the Himalayan Enfield had CS Santosh on the payroll.
IF Enfield has a quiet eye on the Raid De Himalaya, the Ecco or Dakar they'll need a rider like Santosh and a works version of something Enfield but more competitive than the LS Himalayan to do and do it right.