One of my professors worked on LISA Pathfinder, the demo satellite used to proof-of-concept LISA technology until the financial shortcomings in the early 2010s were overcome and he recently said that everyone in the project is hard at work getting ready for the program review, after which either a contract is made or the program is reformulated. But no one will put in the gigantic work needed to prepare such a review if it is not almost certain the program will pass the review and become a contract, so things are looking quite good for LISA and its early 2030s launch!
I think it would be really neat to have a space based telescope in close proximity to LISA so that when gravitational waves are detected the telescope can point in the direction of the source and capture the light from it.
I remember reading about LISA as a kid, around 25 years ago. Currently it is planned to launch in 2037. I somewhat doubt it will ever become a reality.