I just stumbled again over this crowdsale contract and wondering again why it was abandoned in v3.
" All crowdsale-related contracts were removed from the OpenZeppelin Contracts library on the v3.0.0 release due to both a decline in their usage and the complexity associated with migrating them to Solidity v0.6."
If OZ finds it too complex to migrate it to solc v0.6, should I touch and try that ?
Any information what would have been so "complex" ?