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.