What is the max file name length for a file in a traditional folder.
There are problems in some cases if the path + filename together are longer than around 255 characters. I believe Windows sees the Views as folders and handles them as part of the path. You can reduce the view names to help keep the path relatively short.
You are correct in that the 'Name or title' is limited to 100 characters as are all single line text fields. Also the default total limit of the Path + Name is around 260 characters unless the previous Windows fix is applied for this. This would the total length of the name + vault name + search/view path.
The Windows path fix will increase the total length it can be for each computer the fix is applied for but does not increase the 100 character limit for the title.
There is a sort of workaround, in that you can force a multi-line text field to be a single line which increases the text field limit to 10k characters.
This can't be used on 'Name or title' as that's a built in property but you can create a new text property 'Long Name' or similar and apply the fix to that property and then set that to be the name field used for the class(es) as needed.
This won't fix the import truncation issue when it's looking at duplicates but should hopefully give you some more flexibility.