MeowersHmmm... A thought that wandered into my mind randomly. Is there any reason to keep old Sirius non-SCO drives? Except some niche builds (if any) which I don't have?
The short answer - no.
The long(er) answer - Sirius FSDs are currently basically obsolete with possible exception of the class 5 pre-engineered version (as well as the CG exclusive sizes) since it comes with range and fast boot modifications… but most people won’t notice the difference. Or have much more time saved not wasting it on the (otherwise) basically idle supercruise sections which are only remotely involving in Thargoid systems with higher risk of interdiction (and even then you can/usually do just submit, boost away and low wake with minimal/no damage taken… of course they also removed the Glaives after people bitched enough about them because you could actually fail against one, and also that Guardian melter mumbo jumbo).
The only reason to keep Sirius FSDs at this point is because you don’t want to sell your stuff that is engineered. And I guess, if you’re paranoid that Achilles (probably) just stuffing a Titan drive piece into it with a “Good enough” sticker (corrosion-resistant sticker) may cause issues later down the line. Or some idiot from Sirius that got offended at their ruined monopoly sabotages them or something stupid.