If you click the Glacier link, it seems like it's some sort of standalone service and API that's very old. The page says to use S3's Glacier storage tier instead, so no change for the majority of folks that are likely using it this way
Is the implication these services are used so little it isn't worth AWS continuing to invest in developing or maintaining beyond bare-minimum KTLO ops?
https://docs.aws.amazon.com/amazonglacier/latest/dev/introdu...