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Thanks for asking!
It's just my example. I maintain JunicodeRX (...with Restoration Typographical Extensions) which includes yet more non-standard code points and which I continue to add to. In my actual work, I also add in Symbola for additional fallbacks.
Some fonts have better language coverage (Libertine) and others have some custom glyphs I want (JunicodeRX and Symbola). If I had a bit more time, I suspect maintaining a stand-alone Libertine+JunicodeRX+Symbola.otf would be the best approach, but that's a bit beyond me these days.
On 1/7/2022 5:59 PM, J. P. Ascher via ntg-context wrote: the complication in mixing fonts is that one cannot really mix the features arbitrary Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------