I subscribed to Analog for over 40 years and would read the Serial as soon as it was delivered.
McCaffery
Herbert
Sawyer
Spider Robinson
(and many more)
were great in serial form.
I get Baen Webscriptions, but the format of the current portion errors out on my PEz

(and fails to convert with Calibre, probably because Calibre thinks it is damaged, rather than crippled)
My take is serials are a good way for the author to get paid as they write, rather than wait until the whole is done.
The main thing, is COMMITMENT to finish the serial (or series. Dave Duncan's 3rd 'tense' book never came out in paper

, finally available in e-form )