Morgan is my hundredth max skill servants ... after nearly 6 years into the game I reached that milestone. She also became my first servant with max append.
Until now I didn't work on appends on my servant (for many reason like lore limits, mats requirement, other priorities, ...), but starting with her I'll slowly start on it. I should work on appends fully after Grand Nero fest. At least to have a full row of append servants on my support list.
(My priorities would be Atalante, Nyalter, Salter, Maid Alter, Skadi, Ushi Summer and Diarmuid. Then I'll see to work on others like Ishtar/Spish, Bryn (both), etc.)
As to why I'll work fully after Grand Nero Fest on append, it's because at the moment I'm still fully focused on having all my servants 9/9/9 at least. With nerofest, I should have less than 5 servants less to work on.
It has been my target for years and I'd like to finish that first before shifting to append skills.
I'm also waiting for anniv, so I can abuse x3 success on CE bomb and bursting through the thousands of CE exp I stored in archive from last Guda, Valentine and other CE exp events. I'll be able to have 3 more lvl 100 CE with those (+fp).