I think it is a little harsh to deride Obsidian as a toy. It is an open project to create a knowledge base built upon markdown files. I personally believe in the project which is why it is one of the first software projects that I have financially supported. I am also already using it in anger for some of my professional work.
Sure there are some features which would be helpful, although the team are rather open and you can post feature requests under the designated section. I think the most conducive thing there would be to post your requirements as requests and perhaps (this is assuming) walk-through how you would use it. E.g. I would love to be able to view and use SVG files as normal images, since I use them a lot within reports and also have a library of them. That’s why after searching I found a request and added my support to that request. Personally, I don’t use the graph but I can see that this is a draw for others, particularly those interested in ROAM.
As it stands, the software has a good community, and it is free, and developing. I reckon you could contribute in your own way, but you also need to recognise that it will not be all things to all people, and that it may take a while before your requests are supported.