Recently, I keep hearing people talk about block builders, bundles, sounding like some kind of black technology.

Actually, retail investors just need to understand that "don't think you're queuing fairly in a public pool."
The moment you place a trade, someone might have already packaged a series of operations and inserted them before or after you.
A slippage change can turn you into the one carrying the load for others...
Basically, don't be too superstitious about "my quick fingers."

My own simple method: don't chase hot spots with large amounts, and for small trades, first tighten the slippage; if it doesn't go through, just forget it.
When I see a bunch of similar transactions crowded on the chain all at once, I just assume a builder is setting up a stall—don't join the crowd.

The recent testnet points wave is the same. Everyone is betting whether the mainnet will issue tokens or not.
As for me, with a position like a cat, I just dip in a couple of times and then run.
Don't treat "point expectations" as a talisman.
If the mainnet ends up with no tokens... I'll just keep pretending to be dead.