What is the Azure product lifetime -

if build application based o azure today, there guarantee microsoft azure still supported , living after 15 years? product lifetime of azure? guarantee don't have additional cost of migrating new azure api new feature every few years?

it depends on service of azure want use. overall microsoft informs changes. informat month before service changed or dropped. take @ microsoft azure cloud lifecycle faq.

it depends if want use paas, iaas or saas elements. no saas host provides years same version. software has lifecycle.

in azure pay on other platforms usage. if migrate vm 1 vm 2 , both running 3 days in parallel, have pay that. not have addition fee use newest service.

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from provided link can cite guest os:

when guest os family retired?

in future whenever new guest os family introduced, microsoft azure provide 12 months of notice retire oldest guest os family list of supported os families.

what can expect after 12 months of notification period?

at end of 12 month notification period, microsoft azure stop providing latest/patched version retired os family. cloud services using retired os family unsupported , stopped.

for azure cloud services, similar.