I have a lot of experience with Drupal 5, 6 and 7 and am just starting with Drupal 8 and I have a large, complex Drupal 6 site that I need to migrate to D8.
I first tried using D8's Migrate Upgrade but it fails part way through. I didn't have high hopes for this to work but I thought if it could at least get the users and bulk content in then that would be a great starting point. It was unable to accomplish either.
So now I'm going to go the export/import route and try to rebuild the data manually. I've done this a number of times upgrading D6->D7 using XML Views to create the export and Feeds to map and import. It looks like Feeds is nowhere near ready for use yet.
Is using core Migrate module along with other contrib modules to right approach? Is what I'm trying to do even possible?
If so, could anyone point me in the correct direction to get started? I've heard migration plugins mentioned before, I'm assuming that I'll have to create custom migration plugins to make this work, correct?