Your article doesn't say "Larian are no longer involved with development of BG3". It in fact says they're still developing it, but won't be making BG4.
The official Larian BG3 Discord server is promoting a mod competition, and they're still adding content, bug fixes, and new features to the game as well.
I've update the link. It seems they've released a bunch of free content instead in recent patches, which contradicts what they previously said somewhat.
The official Larian BG3 Discord server is promoting a mod competition, and they're still adding content, bug fixes, and new features to the game as well.