Honesty I think Obsidian as a product. They have done a pretty good job of keeping my data open and available in the Obsidian Vault.
I pay them for Sync, so I consider it a service for them to maintain and upgrade the software. I would prefer the client be open source but it would hurt their ability to stay afloat and profitable to pay their employees.
If they go under or start an “enshittification” I can just take my JSON and markdown and make my own client or use one of the hundreds of other markdown clients to get my information.