Yes, I use native LSP with elixir-ls

I have this in my lspconfig for elixir.

-- Elixir
require'lspconfig'.elixirls.setup{
  cmd = { vim.loop.os_homedir().."/path/to/elixir-ls/language_server.sh" };
}

I also have these setup:

" LSP
nnoremap <silent> gd <cmd>lua vim.lsp.buf.definition()<CR>
nnoremap <silent> gD <cmd>lua vim.lsp.buf.declaration()<CR>
nnoremap <silent> gr <cmd>lua vim.lsp.buf.references()<CR>
nnoremap <silent> gi <cmd>lua vim.lsp.buf.implementation()<CR>
nnoremap <silent> K <cmd>lua vim.lsp.buf.hover()<CR>
nnoremap <silent> <C-k> <cmd>lua vim.lsp.buf.signature_help()<CR>
nnoremap <silent> [g <cmd>lua vim.lsp.diagnostic.goto_prev()<CR>
nnoremap <silent> ]g <cmd>lua vim.lsp.diagnostic.goto_next()<CR>

command! -nargs=0 Format :lua vim.lsp.buf.formatting()

I am using completion-nvim for my popup menu but have also been playing around with compe

" Use <Tab> and <S-Tab> to navigate through popup menu
inoremap <expr> <Tab>   pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"

" Manually trigger completion
imap <silent> <C-Space> <Plug>(completion_trigger)

" Set completeopt to have a better completion experience
set completeopt=menuone,noinsert,noselect

" Avoid showing message extra message when using completion
set shortmess+=c

let g:completion_matching_strategy_list = ['exact', 'substring', 'fuzzy']

Neovim fam! 0.5.0 is officially here!

I love the LazyVim setup vs anything else I’ve used and the keymaps are documented and easy to discover with which-key provided out of the box.

I use the nightly build of nvim because it’s proven to be more stable in practice, where with O/S provided nvim package and even stable I would still get nvim crashes.

I didn’t like the LazyVim default use of the ‘s’ keymap for search as I have too many decades of using s to delete the character under the cursor and enter insert mode.

But its is trivial to configure due to clean approach and documentation.

Using terminal Vim 8, not Neovim, and not using the aforementioned plugins, so my post is slightly off-topic, but regarding Elixir language server support I am very happy with my setup, using ALE and ElixirLS. As far as I know, it should work with Neovim too.

I have tried it.

I am not sure if NeoVim has implemented enough of the protocol yet. I wasn’t able to get GoToDefinition or FindReferences to work.

Completions with omnifunc seemed to work, but I didn’t try to get it set up with an actual completions plugin (to have it show completions as I type).

Hover documentation was nice, and is presented with a neovim floating window.