1. I only use it for read only on my phone.
2. Though size can impact load/start up performance, I have found poorly written TW macros and such to cause the biggest performance issues. Large volume of tiddlers can make the problem worse.
I have configured a genealogical solution in TW. So, TW can be used for complex data structures, but you need to be careful on how features are implemented.
I have configured a genealogical solution in TW. So, TW can be used for complex data structures, but you need to be careful on how features are implemented.