Maybe I was not clear enough. I made it not from some classifieds plugin (did not even look at them). Took different plugins for whole different purposes, than directly classifieds, and tweaked and adapted them to Osclass replica. And tried not to touch core code of plugins and WP, except for one old, abandoned plugin for valuta conversions directly on site.
I think WooCommerce is bright example. Relatively rich company behind it, it means you can monetize time input. And WooCommerce needs good performance too, so it means WP can deliver it.
Ok, now it is more clear. Without mentioning names and urls, can you give us an example ? What kind of plugins ?
Some of them:
- SyncFields
- Stream
- ACF
- CF7
- Ajax Pagination and Infinite Scroll
- Canvas Image Resize
- Edit Post Expire
- GDPR Plugin
- QR Codes
- Currency Converter (customized core code by me, not original anymore)
- Plugin Organizer, some Minify and cache plugin to give it max performance.
- Regenerate images/thumbnails
- Search & Filter (this one and AFC Pro need paid licences if something more is needed. But so is (was) that with many Osclass good addons)
- Some plugin for User´s Avatars, profile photos.
- WP-PostViews (as help for admins)
- Post Expirator
- Own custom plugin with different code snippets
- Email & Social networks login (any would work)
- Auto Prune Posts
- Some Database cleaner
- Some Google maps plugin that works with custom fields
- Post Meta Revisions (limited to 3 last, to be able to show publicly seller´s last 3 price (mind) changes
- Relevanssi (search index)
- Manual code for custom post types, but there is Pods plugin to make it easier. (Osclass classifieds categories)
This one is really not needed as it is nothing seller is aware of. But makes life of website developer so easy and makes it unlimited with possibilities to extend things in the future without disturbing website and users. Custom attributes per category, User permissions, custom set of custom fields per category, all...
It was before the Gutenberg era. Maybe will have some time in the future to try it with Gutenberg. I am still skinny with Gutenberg coding, have to spend some time learning first.