Thank you for your kind comments. I’m happy that it was helpful to you. This discussion has been great to me too; I had been meaning to do a write-up of this sort for some time. Your question gave me the impetus, and it helped me clarify some of the things I wanted to clarify for myself.
Just a piece of paint software called Krita on Linux and an old pen tablet. I’m self-teaching digital drawing at the moment and I use (this pen tablet) – as an aside, I’d advise against any pen tablets with no screen unless you are very keen to learn how to use them. Even many professional digital artists (on YouTube) say they need getting used to. Outside Linux, I use iPad and Apple Pencil for more casual drawing.
Two more comments: on use of tags, and on pruning
On tags, there has been some good discussion threads. I find the ones in which @rodelrod is involved are always informative (this on Slack, and relatedly, this on this forum). Just to cut the long story short, I’ll jump to my crude take of the gist:
- Use tags sparsely to denote types of notes rather than liberally as topics
- Use index notes and (back)links for topics instead
Of course, you are free to develop your own tags usage. Personally, I have been happily following this tag usage. My personal reasons are mainly as follows:
- I have tried topics tags and realise I get inundated by too many useless tags
- I had already been sticking to the usage of “tags” as types (the only four categories I noted above) informed by this old article from 2009 – it then refers to yet older discussion, which has been relocated to this forum post.
On pruning, you do not have to really delete the files from your system. I have a folder named “fleeting” outside Org-roam as a holding bay (keeping notes from 2011). I might just move pruned notes to it and come back for review later. Alternatively, you could have a subfolder for fleeting notes within Org-roam and show its name in org-roam-node-find so that you can differentiate your “thoughts” notes from those “fleeting idea” notes.
There is a bit more personal story behind why I am starting this “pruning” experiment, but I’ll stop here for now 
I’m also keen to know the story of the 70GB of notes in Evernote.