This is what allowed Temu and Alibaba and Wish and the like to happen (their business model was to send every single product as a single package worth under 800$, leading to enormous shipping times and waste etc., but they don’t have to pay import taxes).

Logseq, it’s a lot like Obsidian as it also has knowledge graphs, tags, is markdown-based and self-hostable but, in contrast to Obsidian, it’s fully open source