Hi, as far as I know, they aren't planning to phase out ERC-20 VIT. For now the native VIT will be used on the VIT network and any sites integrated with the VIT blockchain. The ERC-20 VIT would be used for moving out of the ecosystem onto an exchange or hardware wallet. That is what I understand to be the current situation. But things can change. I'd recommend joining the VIT Telegram chat and just drop in every so often to keep an eye on the situation.