I updated to 4171 because one of my plugins was running into the “api not available” issue.
Sublime now gets stuck while/after loading plugins with a beachball of death (MacOS). No errors, I can just see it loading plugins (I tried uninstalling/deleting the last plugins that showed in the console, but that didn’t help).
I can start in safe mode, but can’t open my regular sessions. Help. 
Quick note: because I couldn’t add multiple images while posting. I did remove another package that I was suspecting and the editor now worked until Package Control decided to update it:
I’m going to try to get rid of this package completely somehow …
You can downgrade to a previous version by downloading 4168 from https://www.sublimetext.com/docs/previous_versions.html.
We’re working on fixing this issue.
Thanks. It turns out it seems that “UnitTesting” is the broken package, once I removed it so that PackageControl didn’t reinstall it, ST is unstuck now.
I upgraded to 4172, which the release notes say has a fix for package deadlocking, but I was still seeing the hang-on-launch as well.
11 api_helper::api_plugin_host_loaded_plugins(std::__1::vector<std::__1::pair<object_id, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>, std::__1::allocator<std::__1::pair<object_id, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>>> const&) + 496 (sublime_text + 784356) [0x1020fb7e4]
11 bool wait_for_reply<int>(shm_bundle*, reply_entry*, int*) + 76 (sublime_text + 824936) [0x102105668]
11 shm_read(shm_channel*, string_buffer*, int, long long) + 48 (sublime_text + 1109764) [0x10214af04]
11 sem_wait + 8 (libsystem_kernel.dylib + 67892) [0x18a40f934]
*11 ??? (kernel.release.t6000 + 31396) [0xfffffe0008533aa4]
I’m on macOS Sonoma 14.1.2. No hang when launched in Safe Mode. I downloaded 4169 and everything is fine again. If it would be helpful to determine which package(s) is/are at fault, I can try a binary search with 4172.
"installed_packages":
[
"AutoFoldCode",
"Babel",
"Case Conversion",
"ChannelRepositoryTools",
"ClearConsole",
"Color Highlight",
"Decent Swift Syntax",
"Dockerfile Syntax Highlighting",
"DotENV",
"Fmt",
"FoldFunctions",
"GitHubinator",
"Hooks",
"isorted",
"Jinja2",
"JSCustom",
"JsPrettier",
"LoremIpsum",
"LSP",
"LSP-css",
"LSP-json",
"LSP-pyright",
"LSP-rust-analyzer",
"LSP-svelte",
"LSP-tailwindcss",
"LSP-terraform",
"LSP-typescript",
"LSP-yaml",
"MCFunction",
"MDX",
"NeoVintageous",
"Package Control",
"PackageDev",
"Project Specific Syntax Settings",
"python-black",
"SaneSnippets",
"Sass",
"ScopeHunter",
"Show Character Code",
"Svelte",
"Switch Window",
"Tailwind CSS",
"Terminus",
"Terraform",
"TOML",
"Typora Markdown App (OSX)",
"VimL",
"Virtualenv",
"Wrap Plus",
],