key callouts:

• async treesitter. opening and editing treesitter-highlighted files never blocks the UI or user input.
• defaults. especially LSP defaults
• many new stdlib fns, but no new RPC API fns. but we have a clear path to more flexibility in the RPC API, while still maintaining back-compat.
• lsp config: Use |vim.lsp.config()| to define, and selectively enable, LSP configurations. This is basically a wrapper around |vim.lsp.start()| which allows you to share and merge configs (which may be provided by Nvim or third-party plugins)
• ....

screenshots:

• OSC 133 shell prompts
• virtual_lines lsp diagnostics