Check out what I found in a mega account I have... If I flash this... What will it do? I didn't know what this was but figured it would be a good idea to save it lol... You're saying either way a dsu won't work because the OG Pixel isn't supported?You're welcome.
For the partitions, the Pixel has some cloned partitions (A and B partitions. For example: system_a and system_b, boot_a and boot_b, etc.) and then a common partition which is the user data partition.
You can flash different ROMs on each partitions, but it won't work because they both will use the same user data partition generating conflicting data and data corruption if encrypted.
Dynamic partitions are, from what I understand, partitions that can be dynamically resized, which means that you can flash a ROM of any size because the partition will always adapt. With dynamic partitions you can flash big GSIs without issue.
For reparting the Pixel, there's an easy way which is using the repartition script found in the PixelExperience installation guide,
or you can follow the following guide on how to do it manually.
The guide was removed