Rob Morley wrote:

Might only be needed occasionally but it'd be a shame if one of those
occasions was in the middle of what would have been your best ride
ever and your bog standard pump failed to deliver decent pressure,
or broke.

Better carry a defibrillator as well, just in case your best ever ride
gets interrupted by acute myocardial infarction.

Punctures are the most common sort of mechanical failure, and they're easy
to do something about, so it makes sense to be well prepared for them.

To put the weight into perspective, the HPX is only 100g heavier than a
bogstandard plastic pump.

~PB