Worth reading the whole article (it's a quick read) but the major takeaways seem to be
1) Because TIPS are marginally less liquid than regular treasuries, right now -- based on two different metrics for expected inflation -- there is no yield penalty and actually a small yield bonus to buying TIPS relative to regular treasuries.
2) In the absence of a yield penalty or even in the presence of a small (.0-0.5%/year) penalty it would make sense for investors to have the majority of they assets allocated to US government debt in TIPs rather than regular treasuries.
