Router ROMMON upgrade - your opinions

Question

Hello,
I've read in several documents that there is only a need to upgrade ROMMON if there are new features in new ROMMON versions.But, e.g. the ROMMON upgrades for the Cisco 2800 platform, the changelog for 12.4(13r)T5 says "Enhancement for device access in certain Cisco routers.",
12.4(13r)T6 says "DRAM access optimization" and 12.4(13r)T11 says "write/erase timeout increase + status read changes".
Or with the Cisco 2900 platform, the changelog for 15.0(1r)M10 says:
Saving of IOS config sometimes fails on some 2900s (Fix in ROMMON)
-    Bootflash access timing parameter change.
Compact Flash timing parameter changes (ROMMON)
-    Compact flash access timing parameter change.
I think the bug "Saving of IOS config sometimes fails" is not a small one. And I don't know what "DRAM access optimization" or "write/erase timeout increase + status read changes" exactly does.
Is it still true to upgrade ROMMON just in case there are new features which are needed. Or should the ROMMON be upgraded just as the IOS if a new version with fixes is available?
Thank you for your opinions.

Answer 1

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Just like with IOS upgrades, generally most would upgrade if there's a new feature or bug fix that pertains to you.  When neither is true, most prefer to not upgrade; "it ain't broke, don't fix it".
Consider many software releases are for bug fixes, so although you might not have bumped into a known defect, you may.  This would argue for upgrading all maintenance fixes.  However, sometimes, maintenance for defects introduces other defects.  This argues only do an upgrade if operationally necessary.
So, whether it's an IOS or ROMMON upgrade, it's really what you think is best.
PS:
BTW, for some platforms like the 2800, I recall an effective ROMMON update would force an immediate reload, unlike a IOS upgrade which can be loaded onto flash and the reload scheduled for later.  (Suspect this is why Leo insures there's a new IOS on the 2800 before he does the ROMMON upgrade.)