Recently, the group has been arguing again about whether extreme funding rates are a reversal or just continuing to inflate the bubble.

As I watch, I think: retail investors really don’t need to study "block builders" or "bundles" to the point of writing papers.
Honestly, you only need to know two things: the transactions you send may not be included in blocks in the order you see; someone might bundle a bunch of transactions together and insert them.
So chasing hot topics, placing very thin slippage, or front-running on-chain can feel especially mystical.
Later, I thought it was quite funny—we stare at candlestick charts every day, but the actual experience of your trades might be decided by "who is assembling the bundles."
I now assume the blockchain is a crowded marketplace: give enough slippage, don’t rush with market orders, split important operations into batches, use reliable private channels when possible, and for the rest… forget it, don’t see yourself as a miner.