Same applies for bookkeeping. Though my .xls will probably outlive most applications, I'm certain that the csv version is readable decades from now. CSV is a po

Same applies for bookkeeping. Though my .xls will probably outlive most applications, I'm certain that the csv version is readable decades from now. CSV is a poor format, so I'm using a plain text ledger [0] (specifically: the beancount[1] dialect). I'm quite certain that no webbased SAAS accounting tool will be around in decades. But I'm certain my (git sourced) foo.ledger files are readable and parseable for ages. And if worst comes, they are human readable, so I could even just copy it over, or parse it, manually. [0] https://plaintextaccounting.org/ https://plaintextaccounting.org/ [1] https://github.com/beancount/ https://github.com/beancount/ FWIW: I chose the beancount dialect over the simpler hledger/ledger format because of the additional support for investments/currencies/assets.