I make no secret that I use bamboo blinds as warp packing. Usually I buy cheap ones, but they tend to wear out quickly - apparently I use them - a lot.
Yesterday I stopped at Jysk (a 'cheap' IKEA) to buy more and could not find any blinds. Thinking that they sometimes put inventory in 'odd' places, I decided to walk the store and lo and behold, near the exit was a cart with wooden slat blinds. Now, I don't usually buy this type of blind because they are more expensive than bamboo, but they were on sale for $5 each!
They are 140 cm wide and cut in half, that means I will have 10 blinds 70 cm wide. This is a little narrower than I usually go, but since I rarely dress the Fanny with a warp much wider than 24", a 27" wide blind will be fine. And a much higher quality blind so I figure I have enough warp packing to last the rest of my weaving life.
I sometimes see discussion about various kinds of warp packing on chat groups. People love their paper. People love their wooden slats. People love their venetian blind slats. I happen to love my wooden blinds.
Ultimately the 'right' answer to any question in weaving is that which gets you the results you desire.
All I am suggesting is that if someone is having issues with their processes or tools, they might like to try something different. If someone likes my results, they might like to try my approach. If it doesn't work for them, then figure out what does.
The only 'correct' answer (in short form) in weaving is...it depends. Each person, each situation, each loom, each yarn, each studio space - each one may require a somewhat different answer to those I have found for myself.
Try it. Accept it. Adapt it. Reject it. Do whatever it is that you need to do to find your happy place, make the cloth you intend to make. Become your own 'expert' for your circumstances.
Discover the principles of the construction of cloth and choose your own road. The 'right' answer? It depends.