In a big short, using:
- Joomla 5.2
- Sp Page Builder Pro
- Helix Ultimate template
- Akeeba Backup (just in case)
You can build a whole "small" company or organization website in one weekend, if you have texts and images, and accepted menu structure. More advanced projects request more time & patience ... not necessery more extensions. Onepage site & Landing page - you can create much faster.
For "quick & lazy" projects we have > https://www.joomshaper.com/page-builder/layouts for SPPB, so all you have to do is import, replace text and photos. Easy.
Based on my personal techer experience: Now working with students after few hours, they are able to do more than 10 years ago after a few days of training, I still remember times when there was no SPPB for Joomla, and whole layout was based on modules, articles and manually added CSS. Then it was a time-consuming process, now is not anymore.