Note: Funding Information: This research was financially supported by the Gravitation Program “Materials Driven Regeneration (MDR)”, funded by the Netherlands Organization for Scientific Research (grant no. 024.003.013); and by the Horizon 2020 Research and Innovation Program “Ink-based hybrid multi-material fabrication of next generation implants (INKplant)”, funded by the European Union (grant no. 953134). We would like to thank Sanne Peters for commenting on a draft version of this commentary.