In 80% of use cases, truncating a field to a specified number of characters makes sense for teaser display modes. For those few use-cases where you actually want different content, what you really should be using is a different field.
Having these two concepts contained in a single field is confusing for users, and will become even more confusing when we introduce a Rich-text editor.
We may need to include some kind of an upgrade path for sites that were using the splitter before, but I think that could be done reasonably easily.
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I did try something similar to this as well, but as far as I can tell, there is no option to set the timezone handling in backdrop's views. :( I can set a different date format, but I cannot...
How to Display Date & Time in Original and Local Time Zones
The preview comment links to the website of an online game.
ERR_HTTP2_PROTOCOL_ERROR in Google Chrome and MS Edge
Being on a vacation, I can't check the option to choose a time zone format in a views block. However, here is another idea: Add the field to a layout. Backdrop allows individual fields to...
How to Display Date & Time in Original and Local Time Zones