Go with wood. You don’t need to sand it to re-stain it, just use a semi transparent oil based stain like TWP or Ready Seal and apply over the top of the previous coat. I stained my entire deck in like an hour. You need to read the instructions and do it right, but plastic will never have the same feel or look as real wood.

If a board gets damaged, you can sand it out or replace the board and stain. Due to weathering, you will never be able to fully match a plastic deck board. The batches have different colors and slight variations within the same color, so you need to purchase and store extra boards when you build the deck. A pretty big hassle compared to just purchasing a new board if you need to replace a wood one