Do not be put off by your successes that vanish. Everything vanishes. Do not cling to it. Bear in mind: Your failures will vanish too ...
I have created and watched vanishing:
In 2000 I created a lovely webapp for a commercial company with Linux, PHP, PostgreSQL and the help of a friendly webdesigner. It awed people in the business and in front of their -- then tiny -- computer screens. It has been 'refactored', 'redesigned' and finally returned to the digital ashes where it came from.
Actually: Remembering my professional life at the time I did two of those. Both sharing the same fate.
Do not be sad. Do not pity me. That is how everything's and everyone's journey turns out to be ...
After years and years of struggeling a company employed me to redesign the technical infrastrukture for several important applications used by public authorities. IBM did not deliver, their machines where often reason for failures and blackouts. I split the services on several redundant machines which where monitoring each others health and services. It worked like a charm .. to be completely replaced two or three years later.
I did several projects that had been very successful and despite of that been given away 'for free' to other companies by the top management of my employing companies.
Do not be tied to the successes or failures of your work, neither emotionally nor professionally. In the end the difference is not that big.
Try to be focused and determined but not obsessed. Be aware that everything is only 'important' for a very short period of time (if at all).