Time to retire Currier languages?

[Scarecrow]

For instance, these 12 pages consist of three bifolios. If one looks at You are not allowed to view links. Register or Login to view., it is clear that the outer bifolio f26/31 was written in a different time (and/or by a different scribe and/or with a different writing system) than the other two bifolios.

Could this edy difference be explained by writing in different tense, i.e. bifolio 26 was written in (some) perfect and thus needed edy but the other bifolios in present. Tense is just one example, could be some other construction. Imperative. Future. Could this be possible ?

Many times I’ve imagined that vms writer started this when he was young and finished it when he was old,  so the writing reflects how the writer mastery of the languages evolved. The older he gets, the way of writing changes, from style, vocabulary to calligraphy. And reflecting also how the language evolved in the environment he/she lived in, picking up newer trends.