As the project is GPL’ed I guess they sell a commercial version. GPL is toxic for embedded commercial software. But it can be good marketing to sell the commercial version.
The "byte-code" coming from the query planner typically only has a handful of steps in a linear sequence. Joins, filters, and such. But the individual steps can be very costly.
So there is not much to gain from JITing the query plan execution only.
JITing begins to make more sense, when the individual query plan steps (join, filter, ...) themselves be specialized/recompiled/improved/merged by knowing the context of the query plan.
Sometimes, but not necessarily.
It depends on the competence of the DEI "figurehead".
Some communities had a figurehead installed by committee who provoked negative reactions due to bad decisions. Sometimes the leadership arose naturally or just turned out very competent.
The situation the author describes is one of the reasons why we cannot (yet) get rid of Elsevier and the other scientific publishers. They are no longer needed for the dissemination of new research. But they are the keeper of the archive.
We don‘t know which works are going to be important for future generations. And just putting out a „PDF on the net“ will be gone in 20 years if there is no publishing house maintaining the original copy.
Arxiv could also take on that role.
But not for the last 300 years of existing research in the publishers archives.
You are working on the most urgent and important topic that I know of. But it is also very hard to pull through. I wish you the best success.
Here are two recent startups in the field with multi-million funding. They were serious approaches. Many people involved with good planning, etc. They still fizzled out when it came to installing their first capacity.
I believe a reason for the funding problems is the high uncertainty for the economics of storage. Electrical energy is traded in a market. And your trading strategy in the market has a big impact on whether you earn money. Without solid numbers for energy storage and the expected trading outcome, investors will have a hard time.
So no, the end result can still be DRY.