When the USMLE moved to more, shorter blocks during 2026, most of the commentary was about test day. There is a smaller question worth asking about the tools: whether the thing you practise on can actually rehearse the new shape.
The setting that now matters
Configurable block length. It has always been there in the major banks and almost nobody changed it, because the default matched the exam.
The defaults were set for the previous structure. Unless you have changed it, you are very likely practising in blocks sized for an exam that no longer exists.
This is a one-minute fix rather than a reason to change product, but it is the single highest-value setting to check right now, and it is the one that gets overlooked precisely because it used to be correct by default.
What to look for
Can you set the number of items per block? Almost all can. Confirm yours does and change it.
Do analytics aggregate across a session of several short blocks? This one genuinely varies. Under the new structure, a meaningful practice session is several short blocks in sequence, and a bank that reports each block in isolation makes the pattern harder to see. You want the combined view, ideally broken down by system and discipline rather than as a single percentage.
Does the timer behave like the exam? Per-block countdown rather than a single session timer. Minor, but it is the thing that trains the checkpoint reflex.
What does not matter
The interface resembling the real one. Banks vary in how closely they mimic the exam’s look, and the resemblance is worth very little. Navigation is learned from the official tutorial in ten minutes, and no third-party interface is a substitute for that.
Claims of matching the new format. Every bank will say this. The only thing worth checking is whether the settings above are actually configurable, which you can establish in a trial in about two minutes.
The one that is easy to miss
If a bank aggregates across short blocks and reports by system and discipline, the new structure is arguably better for review: several short blocks produce the same number of questions with more natural breakpoints, and the combined breakdown shows patterns that a single long block can bury.
QBankly is built around that review breakdown rather than question volume, and it configures block length, so it rehearses the new shape without much fiddling. That is worth checking in a trial against whatever you are using, on a topic you already know well so you are judging the explanations rather than the novelty.
The honest summary
This is not a reason to change question bank. It is a reason to spend two minutes in the settings of the one you already have, and to prefer combined analytics over per-block ones when you are choosing.
Switching banks mid-preparation costs you your accumulated performance history, which is worth considerably more than any format setting.
Frequently asked questions
Does block length really matter for practice?
Yes, for pacing. The checkpoint you learn to hit is set by the length you rehearse, and an internal clock calibrated to forty items fires at the wrong moment in a block of twenty.
Is it worth switching banks over this?
Almost never. Configurable block length is common, and switching costs you accumulated performance history, which is worth more than the setting.