Time has changed and countries, companies or people not adapting themselves to the changing reality will be loosers. Here let me tell you why;
I use Neo4j now even for keeping my everyday notes And it makes sense to use it. Neo4j is used today by Army, Police, Intelligence Agencies, Hospitals, Stock Market and Digital Coin traders etc.
Neo4j is a database, but out of ordinary. There are no Descartes's cartesian minded tables but connected bubbles.
Each of the bubble is like the Dr Who's phonecall cabin:"it is bigger from the inside".
I once used Word, Excel and finally dbms databases and especially Ms Access for it. All 3 have problems.
In word you have to write down literally the connection. In excel too, because as time pass one cell next to other doesn't mean they are connected. I forget things.
RDBMS database like mySQL and Microsoft Access, (especially Ms Access is super fast and lightweight) , and the relationship design tool helps you making few connections.
I used much more longtime rdbms database then others to store my notes.
But....
RDBMS is much like theoritical kind of approach to reality. The reality is like a wild horse, and RDBMS is like a painful limitation box, trying to immobilize the reality. Confused? Let me explain.
RDBMS are forcing data to be in strict rule. And this "forcing" is sometime exagerated. Many data doesn't fit in RDBMS and we change the nature of the data so as it fits into the RDBMS database. In time the database becomes a great aberration an absurdity mirror of the reality..
I designed and managed RDBMS database for over 17 years in oil and gas projects. And I constantly saw this sinking in the mud databases.
After each project these data of the rdbms database were becoming meaningless useless.
So lets look now at the graph database. The graph database is a mix of rdbms and noSQL databases.
You can make the data entry of formalistic data or the no-rule wild horse data in it. It accepts both. And this is the mirror of real life. Some things in our business or private life are ordered and some others are floating, no rule things.
We can not disregard, hide under blanket the no rule data. They are there as a reality.
And your every day notes are like this; some are ordered, and with ordered connection. Some others are just floating but somehow connected to other things in your life. Or if it is not connected now, it can be connected in the near future.
RDBMS databases, LibreOffice sheets or Google sheets or MsExcel will still be used for few more times. But their time is over for sure.
Word can incorporate NoSQL data, but it is long to write down, and people are lazy to read even a paragraph. So word is loosing ground by giving plus signs to Pinterest, Instagram,Tiktok Telegram VK or Youtube kind of noSQL data storage systems.
So taking notes in Neo4j or other NoSQL relational system is highly intelligent approach and is sustainable. Your notes will not die for years.