Starling Bank closed theirs back in 2018 and outlined very well their reasoning behind it, in particular when they said “Too often, however, we’ve found the challenge of running it has proved too big a distraction from our core job, which is to protect the interests of our wider customer base and to grow the bank.” - Blog - Starling Bank.
I’d swap this forum for a LISA any day and I think there are others who’d feel the same about the delivery of Tax Statements, JISAs, SIPP Employer Contributions, or even answers about the £10,000 NFT crowdfunding perk (details were promised very soon in early July - Freetrade NFTs - #81)