I am currently (once again) in the process of trying out different window
managers to see which one fits my needs the most.  
I used dwm from 2020 until mid 2022, where I then switched to i3wm. I also tried
out ratpoison for a couple of weeks. Right now I'm using bspwm. I like it, but
have some complaints. It's very easy to configure and use and it only uses about
2MB of RAM, which probably makes it one of my top picks for low-end machines.
The problem I have with it is after using ratpoison, I don't like how every
other window manager arranges windows. I don't like the concept of workspaces
and I don't want to use an external program like rofi or a dmenu script to
switch between windows. Ratpoison makes this extremely easy by using screens
and frames instead of workspaces. I don't need to worry about which workspace
or screen or even which monitor a window is in, I can simply switch between
them and don't have to place them in another workspace or monitor; it just
works. This is the same problem I have with i3wm and dwm, although with i3wm
you still have containers. With dwm and bspwm it's just either fullscreen one
window or have them all in splits. I might try out herbstluftwm, because from
what I've seen it also has the ability to split the screen into different
frames.  
Honestly, I might go back to ratpoison, because out of all window managers, this
is the one that fits my workflow the most. The ONLY thing that I'm missing is
that some extended window manager hints like _NET_ACTIVE_WINDOW are not
supported. This means that using a TUI file manager like nnn with the plugin
preview-tabbed, the tabbed window always steals focus whenever I hover over a
new file. I tried switching to preview-tui, but it always stops working after
a couple seconds. I tried to patch the ewmh in myself by looking at sdorfehs -
the spiritual successor to ratpoison - but it never worked.  
I am still debating whether I even need this preview functionality. I only use
it a couple times a month and could do everything I need to just with sxiv
instead.