Thank you Mark-Kashman and Jonathan (I can't seem to tag him). I would welcome the opportunity to take this offline and speak.
We have been trying to "embrace" the modern workplace more and more, we have many smaller clients that are using Sharepoint/Onedrive without any issue - however, our larger clients just come up with issue after issue.
We have fully integrated the Graph API with third party ERP/internal systems and it is a complete joy to use - however, we have followed all Microsoft guidelines where possible and are just completely failing at core issues relating to the sync client.
I see case study after case study from large organisations (and obviously I know you use it internally), but, I'm just banging my head against a wall figuring out why we have these issues - and, unfortunately, support has been less than helpful.
Recently I was tasked with copying a large folder structure from within Sharepoint from one site to a new one. I first tried to use the Onedrive client as the simplest solution - but, after 3 days on an I9 machine with NVME, it was still "checking for changes", so, I tried using the webpage.
Even very basic operations like copying/pasting are a complete pain. This operation involved ~250k files across 30k+ folders. There is no accurate progress and it just randomly hangs. If you then try starting again, there is no resume/overwrite/skip options, only keep both or cancel. This means I had to constantly delete folders, go in to the folder to a deeper level and just do a few at a time.
After asking for assistance in various communities, I was told my best option is to purchase Sharegate - I have nothing negative to say about them, but, when multiple people are telling me that I need to purchase a $4k a year tool to just copy files, something is very wrong with the core of a product.
In the end, we have finished copying all these files for a client through a very manual and time consuming process that took almost a week (tried numerous powershell scripts I found - all just took time and didn't help).
It is great to read about all the new advanced additions to the product(s), but, I just can't believe that we are having these fundamental issues with a Microsoft product on a Microsoft Product when Dropbox worked almost flawlessly and I don't understand why more people aren't vocal as I just can't see our use case being that out of the ordinary.