Many aarch64/ppc builds are missing: travis unreliability?

[corneliusroemer]

Solution to issue cannot be found in the documentation.

• I checked the documentation.

Issue

I noticed that many python versions are missing for aarch64/ppc, not sure why. Maybe just travis flakiness?

We could stop using travis and use emulation instead for better reliability.

Installed packages

n/a

Environment info

n/a

[corneliusroemer]

Migrate to azure emulated: conda-forge/conda-forge.github.io#1521 (comment)

[corneliusroemer]

Until then, simply rerunning the job seems to work - things that fail first time work the second time, with luck