From my experience, yes. Lucene is a "production" state of art library and Solr/Elasticsearch is very used in many scenarios.
This expertise is very on demand.
My company personally migrated from ElasticSearch to https://vespa.ai/ and could not be happier. Faster and way easier to maintain a cluster. The "Application Packages" feature present in Vespa opened many opportunities to improve our product( Curiously we use Lucene inside our custom application for a "Search map" functionality, for something like that https://www.lexisnexis.com/en-us/products/lexis-advance/sear... ) . I highly recommend it!
This expertise is very on demand.
My company personally migrated from ElasticSearch to https://vespa.ai/ and could not be happier. Faster and way easier to maintain a cluster. The "Application Packages" feature present in Vespa opened many opportunities to improve our product( Curiously we use Lucene inside our custom application for a "Search map" functionality, for something like that https://www.lexisnexis.com/en-us/products/lexis-advance/sear... ) . I highly recommend it!