It is also one of the useful office suites that provide a native Linux experience, but sadly, it is neither free nor open-source...

That's a hard no from me, big shoots.

Don’t know how this is related to FOSS or Linux at all. It is not free of charge/free software and I don’t get why a site called "itsfoss" is even writing about it.

IMO FreeOffice, the free (of charge) version of SoftMaker Office, is a good office suite for people transitioning away from MS Office that has nice clean UI and very good compatibility with MS Office file types, handy for Linux users who absolutely need to work with MS Office files. Not a choice if you stick to open source, though, unfortunately, and overall, LibreOffice still has more features available even if its MS Office compatibility isn't as good.